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Glossary of areas of mathematics

Adapted from Wikipedia · Discoverer experience

Mathematics is a wide and fascinating subject that is often divided into many different areas or branches. These areas are defined by what they study, the methods they use, or both. For example, analytic number theory is a special part of number theory that uses tools from analysis to explore natural numbers.

This glossary lists many of these areas in alphabetical order, which means it doesn’t always show how they connect to each other. If you want to learn about the biggest parts of mathematics, you can visit Mathematics § Areas of mathematics. There is also a detailed list called the Mathematics Subject Classification, created by mathematicians to help organize books and articles about math. This system helps experts and readers find the exact area of math they are interested in.

A

Absolute differential calculus

An older name of Ricci calculus

Absolute geometry

Also called neutral geometry, a synthetic geometry similar to Euclidean geometry but without the parallel postulate.

Abstract algebra

The part of algebra devoted to the study of algebraic structures in themselves. Occasionally named modern algebra in course titles.

Abstract analytic number theory

The study of arithmetic semigroups as a means to extend notions from classical analytic number theory.

Abstract differential geometry

A form of differential geometry without the notion of smoothness from calculus. Instead it is built using sheaf theory and sheaf cohomology.

Abstract harmonic analysis

A modern branch of harmonic analysis that extends upon the generalized Fourier transforms that can be defined on locally compact groups.

Abstract homotopy theory

A part of topology that deals with homotopic functions, i.e. functions from one topological space to another which are homotopic (the functions can be deformed into one another).

Actuarial science

The discipline that applies mathematical and statistical methods to assess risk in insurance, finance and other industries and professions. More generally, actuaries apply rigorous mathematics to model matters of uncertainty.

Additive combinatorics

The part of arithmetic combinatorics devoted to the operations of addition and subtraction.

Additive number theory

A part of number theory that studies subsets of integers and their behaviour under addition.

Affine geometry

A branch of geometry that deals with properties that are independent from distances and angles, such as alignment and parallelism.

Affine geometry of curves

The study of curve properties that are invariant under affine transformations.

Affine differential geometry

A type of differential geometry dedicated to differential invariants under volume-preserving affine transformations.

Ahlfors theory

A part of complex analysis being the geometric counterpart of Nevanlinna theory. It was invented by Lars Ahlfors.

Algebra

One of the major areas of mathematics. Roughly speaking, it is the art of manipulating and computing with operations acting on symbols called variables that represent indeterminate numbers or other mathematical objects, such as vectors, matrices, or elements of algebraic structures.

Algebraic analysis

motivated by systems of linear partial differential equations, it is a branch of algebraic geometry and algebraic topology that uses methods from sheaf theory and complex analysis, to study the properties and generalizations of functions. It was started by Mikio Sato.

Algebraic combinatorics

an area that employs methods of abstract algebra to problems of combinatorics. It also refers to the application of methods from combinatorics to problems in abstract algebra.

Algebraic computation

An older name of computer algebra.

Algebraic geometry

a branch that combines techniques from abstract algebra with the language and problems of geometry. Fundamentally, it studies algebraic varieties.

Algebraic graph theory

a branch of graph theory in which methods are taken from algebra and employed to problems about graphs. The methods are commonly taken from group theory and linear algebra.

Algebraic K-theory

an important part of homological algebra concerned with defining and applying a certain sequence of functors from rings to abelian groups.

Algebraic number theory

The part of number theory devoted to the use of algebraic methods, mainly those of commutative algebra, for the study of number fields and their rings of integers.

Algebraic statistics

the use of algebra to advance statistics, although the term is sometimes restricted to label the use of algebraic geometry and commutative algebra in statistics.

Algebraic topology

a branch that uses tools from abstract algebra for topology to study topological spaces.

Algorithmic number theory

also known as computational number theory, it is the study of algorithms for performing number theoretic computations.

Anabelian geometry

an area of study based on the theory proposed by Alexander Grothendieck in the 1980s that describes the way a geometric object of an algebraic variety (such as an algebraic fundamental group) can be mapped into another object, without it being an abelian group.

Analysis

A wide area of mathematics centered on the study of continuous functions and including such topics as differentiation, integration, limits, and series.

Analytic combinatorics

part of enumerative combinatorics where methods of complex analysis are applied to generating functions.

Analytic geometry

1.  Also known as Cartesian geometry, the study of Euclidean geometry using Cartesian coordinates.

2.  Analogue to differential geometry, where differentiable functions are replaced with analytic functions. It is a subarea of both complex analysis and algebraic geometry.

Analytic number theory

An area of number theory that applies methods from mathematical analysis to solve problems about integers.

Analytic theory of L-functions

Applied mathematics

a combination of various parts of mathematics that concern a variety of mathematical methods that can be applied to practical and theoretical problems. Typically the methods used are for science, engineering, finance, economics and logistics.

Approximation theory

part of analysis that studies how well functions can be approximated by simpler ones (such as polynomials or trigonometric polynomials)

Arakelov geometry

also known as Arakelov theory

Arakelov theory

an approach to Diophantine geometry used to study Diophantine equations in higher dimensions (using techniques from algebraic geometry). It is named after Suren Arakelov.

Arithmetic

1.   Also known as elementary arithmetic, the methods and rules for computing with addition, subtraction, multiplication and division of numbers.

2.   Also known as higher arithmetic, another name for number theory.

Arithmetic algebraic geometry

See arithmetic geometry.

Arithmetic combinatorics

the study of the estimates from combinatorics that are associated with arithmetic operations such as addition, subtraction, multiplication and division.

Arithmetic dynamics

Arithmetic dynamics is the study of the number-theoretic properties of integer, rational, p-adic, and/or algebraic points under repeated application of a polynomial or rational function. A fundamental goal is to describe arithmetic properties in terms of underlying geometric structures.

Arithmetic geometry

The use of algebraic geometry and more specially scheme theory for solving problems of number theory.

Arithmetic topology

a combination of algebraic number theory and topology studying analogies between prime ideals and knots

Arithmetical algebraic geometry

Another name for arithmetic algebraic geometry

Asymptotic combinatorics

It uses the internal structure of the objects to derive formulas for their generating functions and then complex analysis techniques to get asymptotics.

Asymptotic theory

the study of asymptotic expansions

Auslander–Reiten theory

the study of the representation theory of Artinian rings

Axiomatic geometry

also known as synthetic geometry: it is a branch of geometry that uses axioms and logical arguments to draw conclusions as opposed to analytic and algebraic methods.

Axiomatic set theory

the study of systems of axioms in a context relevant to set theory and mathematical logic.

B

Bifurcation theory studies how the shape and structure of patterns change. It is a part of dynamical systems theory, which looks at how systems change over time.

Biostatistics uses statistical methods to study topics in biology, like plants, animals, and living things.

Birational geometry is a part of algebraic geometry that studies shapes based on their properties. It looks at how these shapes relate to each other.

Bolyai–Lobachevskian geometry is another name for hyperbolic geometry.

C

C*-algebra theory

This is a type of math that studies special kinds of algebras, which are sets with certain rules for combining elements.

Cartesian geometry

See analytic geometry

Calculus

Calculus is a part of math that studies how things change. It is connected by the fundamental theorem of calculus.

Calculus of infinitesimals

Also called infinitesimal calculus

This is a foundation of calculus that was developed in the 1600s. It uses very small numbers, called infinitesimals, to study change.

Calculus of moving surfaces

This extends the theory of tensor calculus to include surfaces that change shape over time.

Calculus of variations

This field is about finding the best way to maximize or minimize certain mathematical expressions called functionals. It used to be called functional calculus.

Catastrophe theory

This is a part of bifurcation theory from dynamical systems theory. It is also a special case of singularity theory from geometry. It looks at the shapes that can appear in certain situations.

Categorical logic

This is a part of category theory that connects to mathematical logic. It is based on type theory for intuitionistic logics.

Category theory

This studies the properties of mathematical ideas by organizing them into collections of objects and arrows that show relationships.

Chaos theory

This looks at how systems behave when they are very sensitive to small changes in their starting points.

Character theory

This is a part of group theory that studies special features of group representations or modular representations.

Class field theory

This is a part of algebraic number theory that studies special kinds of number fields.

Classical differential geometry

Also known as Euclidean differential geometry. See Euclidean differential geometry.

Classical algebraic topology

See algebraic topology

Classical analysis

This usually means the traditional parts of analysis, such as real analysis and complex analysis. It includes work that does not use techniques from functional analysis. It can also mean analysis done using classical math principles.

Classical analytic number theory

Classical differential calculus

Classical Diophantine geometry

Classical Euclidean geometry

See Euclidean geometry

Classical geometry

This can mean solid geometry or classical Euclidean geometry. See geometry

Classical invariant theory

This part of invariant theory describes polynomial functions that stay the same even when you change them using certain rules from a linear group.

Classical mathematics

This is the usual way of doing math using classical logic and ZFC set theory.

Classical projective geometry

Classical tensor calculus

Clifford algebra

Clifford analysis

This studies special kinds of operators in geometry and analysis using clifford algebras.

Clifford theory

This is a part of representation theory that comes from Cliffords theorem.

Cobordism theory

Coding theory

This looks at the properties of special kinds of messages called codes and how good they are for certain uses.

Cohomology theory

Combinatorial analysis

Combinatorial commutative algebra

This is a mix of commutative algebra and combinatorics. It uses ideas from one to solve problems in the other. Polyhedral geometry is also important here.

Combinatorial design theory

This is a part of combinatorics that deals with creating and studying systems of finite sets that have special properties in how they overlap.

Combinatorial game theory

Combinatorial geometry

See discrete geometry

Combinatorial group theory

This theory studies free groups and how groups can be described. It is closely related to geometric group theory and used in geometric topology.

Combinatorial mathematics

This area of math is mostly about counting. It looks at both the process of counting and what it tells us about certain properties of finite structures.

Combinatorial number theory

Combinatorial optimization

Combinatorial set theory

Also known as Infinitary combinatorics. See infinitary combinatorics

Combinatorial theory

Combinatorial topology

This used to be an old name for algebraic topology. It looked at properties of spaces by breaking them into smaller pieces.

Combinatorics

This is a part of discrete mathematics that deals with countable structures. It includes enumerative combinatorics, combinatorial design theory, matroid theory, extremal combinatorics and algebraic combinatorics, as well as many more.

Commutative algebra

This is a part of abstract algebra that studies commutative rings.

Complex algebraic geometry

This is the main part of algebraic geometry that studies the complex points of algebraic varieties.

Complex analysis

This is a part of analysis that deals with functions that have complex numbers as inputs.

Complex analytic dynamics

This is a part of complex dynamics that studies dynamic systems defined by analytic functions.

Complex analytic geometry

This applies complex numbers to plane geometry.

Complex differential geometry

This is a part of differential geometry that studies complex manifolds.

Complex dynamics

This studies dynamical systems defined by iterated functions on complex number spaces.

Complex geometry

This studies complex manifolds and functions with complex numbers. It includes complex algebraic geometry and complex analytic geometry.

Complexity theory

This studies complex systems and includes the theory of complex systems.

Computable analysis

This looks at which parts of real analysis and functional analysis can be done using computers. It is closely related to constructive analysis.

Computable model theory

This is a part of model theory that deals with questions about computability.

Computability theory

This is a part of mathematical logic that started in the 1930s with the study of computable functions and Turing degrees. It now also includes the study of more general kinds of computability and definitions. It overlaps with proof theory and effective descriptive set theory.

Computational algebraic geometry

Computational complexity theory

This is a part of math and theoretical computer science that classifies computational problems based on how hard they are, and how these classes relate to each other.

Computational geometry

This is a part of computer science that studies algorithms that can be described using geometry.

Computational group theory

This studies groups using computers.

Computational mathematics

This is math research in areas where computing is important.

Computational number theory

Also known as algorithmic number theory, this studies algorithms for doing number theoretic computations.

Computational statistics

Computational synthetic geometry

Computational topology

Computer algebra

See symbolic computation

Conformal geometry

This studies conformal transformations on a space.

Constructive analysis

This is analysis done using the principles of constructive mathematics. It is different from classical analysis.

Constructive function theory

This is a part of analysis that is closely related to approximation theory. It studies the link between how smooth a function is and how well it can be approximated.

Constructive mathematics

This kind of math tends to use intuitionistic logic. This means it uses classical logic but without assuming that something must either be true or false.

Constructive quantum field theory

This is a part of mathematical physics that shows that quantum theory works mathematically with special relativity.

Constructive set theory

This is an approach to mathematical constructivism that follows the rules of axiomatic set theory, using the usual language of classical set theory.

Contact geometry

This is a part of differential geometry and topology. It is closely related to symplectic geometry and is like the odd-dimensional version of it. It studies a special structure called a contact structure on a differentiable manifold.

Convex analysis

This studies the properties of convex functions and convex sets.

Convex geometry

This part of geometry studies convex sets.

Coordinate geometry

See analytic geometry

CR geometry

This is a part of differential geometry that studies CR manifolds.

Cryptography

D

Decision analysis

Decision theory

Derived noncommutative algebraic geometry

Descriptive set theory

a part of mathematical logic, more specifically a part of set theory dedicated to the study of Polish spaces.

Differential algebraic geometry

the adaption of methods and concepts from algebraic geometry to systems of algebraic differential equations.

Differential calculus

The branch of calculus contrasted to integral calculus, and concerned with derivatives.

Differential Galois theory

the study of the Galois groups of differential fields.

Differential geometry

a form of geometry that uses techniques from integral and differential calculus as well as linear and multilinear algebra to study problems in geometry. Classically, these were problems of Euclidean geometry, although now it has been expanded. It is generally concerned with geometric structures on differentiable manifolds. It is closely related to differential topology.

Differential geometry of curves

the study of smooth curves in Euclidean space by using techniques from differential geometry

Differential geometry of surfaces

the study of smooth surfaces with various additional structures using the techniques of differential geometry.

Differential topology

a branch of topology that deals with differentiable functions on differentiable manifolds.

Diffiety theory

Diophantine geometry

in general the study of algebraic varieties over fields that are finitely generated over their prime fields.

Discrepancy theory

Discrete differential geometry

Discrete exterior calculus

Discrete geometry

a branch of geometry that studies combinatorial properties and constructive methods of discrete geometric objects.

Discrete mathematics

the study of mathematical structures that are fundamentally discrete rather than continuous.

Discrete Morse theory

a combinatorial adaption of Morse theory.

Distance geometry

Domain theory

a branch that studies special kinds of partially ordered sets (posets) commonly called domains.

Donaldson theory

the study of smooth 4-manifolds using gauge theory.

Dyadic algebra

Dynamical systems theory

an area used to describe the behavior of the complex dynamical systems, usually by employing differential equations or difference equations.

E

Econometrics uses math and statistical methods to study economic data.

Elementary algebra builds on elementary arithmetic by introducing variables. Elementary arithmetic is the basic math taught in early school, including adding, subtracting, multiplying, and dividing with whole numbers, fractions, and negative numbers.

Elementary mathematics covers math topics taught in primary and secondary school, such as elementary arithmetic, geometry, probability, and statistics. It also includes elementary algebra and trigonometry, but not usually calculus.

Elliptic geometry is a type of non-Euclidean geometry based on spherical geometry and does not follow Euclid's parallel postulate.

Enumerative combinatorics counts the number of ways certain patterns can be formed. Extremal combinatorics looks at the largest or smallest possible sizes of collections of objects under certain rules.

F

Field theory

This area of algebra focuses on fields, a special type of algebraic structure.

Finite geometry

Finite model theory

This is a part of model theory that looks at interpretations on finite structures.

Finsler geometry

This is a part of differential geometry that studies Finsler manifolds, which are a more general idea than Riemannian manifolds.

First order arithmetic

Fourier analysis

This studies how general functions can be shown or estimated using sums of trigonometric functions.

Fractal geometry

Fractional calculus

This area of analysis looks at the possibility of using real or complex powers of the differentiation operator.

Fractional dynamics

This examines the behavior of objects and systems described using differentiation and integration of fractional orders, using methods from fractional calculus.

Fredholm theory

This is part of spectral theory that studies integral equations.

Function theory

This term usually means mathematical analysis.

Functional analysis

This is a part of mathematical analysis that mainly studies function spaces, which are types of topological vector spaces.

Functional calculus

Originally, this term meant the same as calculus of variations, but today it refers to a part of functional analysis linked to spectral theory.

Fuzzy mathematics

This branch of mathematics is based on fuzzy set theory and fuzzy logic.

Fuzzy measure theory

Fuzzy set theory

This form of set theory studies fuzzy sets, which are sets where items can have different levels of membership.

G

Galois cohomology is a way to study groups using methods from algebra. It looks at how groups act on certain mathematical structures.

Galois theory is named after Évariste Galois and connects two areas of algebra: fields and groups. It helps us understand the relationships between these two.

Game theory studies how people or things make decisions when they depend on each other. It uses math to model these strategies.

General topology is a branch of topology that studies spaces and their properties, without needing them to look like normal shapes.

Geometric algebra is a way to use algebra to describe geometry, showing how shapes and algebraic objects relate.

Geometric combinatorics is a part of combinatorics that looks at geometric shapes and their properties, like the faces of polyhedra or the intersections of shapes.

Graph theory is the study of graphs, which are structures made of points and lines connecting them. It has many uses in real life, like modeling networks and relationships.

Group theory is the study of groups, which are special kinds of algebraic structures that follow certain rules.

Geometry is a branch of math that studies shapes and spaces. It started with looking at length, area, and volume, and grew to include many different kinds of geometry like Euclidean, projective, and non-Euclidean geometry.

H

Hard analysis

see classical analysis

Harmonic analysis

This area of mathematics looks at how functions can be shown using waves. It builds on ideas from Fourier series and Fourier transforms, which are parts of Fourier analysis.

Higher arithmetic

Higher category theory

This is a part of category theory that looks closer at the connections between things, using special arrows to study their structures.

Higher-dimensional algebra

This studies structures that are made more complex.

Hodge theory

This method helps us understand certain properties of smooth shapes by using partial differential equations.

Hodge–Arakelov theory

Holomorphic functional calculus

This branch of mathematics begins with holomorphic functions.

Homological algebra

This studies patterns in algebra using homology.

Homology theory

Homotopy theory

Hyperbolic geometry

Also called Lobachevskian geometry or Bolyai-Lobachevskian geometry, this is a type of non-Euclidean geometry that explores hyperbolic space.

hyperbolic trigonometry

This studies hyperbolic triangles in hyperbolic geometry, or special hyperbolic functions in regular geometry. Other types include gyrotrigonometry and universal hyperbolic trigonometry.

Hypercomplex analysis

This extends the study of functions to include numbers that are more complex.

Hyperfunction theory

I

Ideal theory was an early name for what we now call commutative algebra. It focuses on ideals within commutative rings.

Idempotent analysis looks at special number systems called idempotent semirings, like the tropical semiring.

Incidence geometry studies how different geometric shapes, such as curves and lines, relate to each other.

Infinitary combinatorics expands combinatorics — the study of arrangements — to include infinite sets.

Infinitesimal analysis and infinitesimal calculus are older names for the calculus of infinitesimals.

Information geometry combines ideas from differential geometry to study probability theory and statistics. It looks at special spaces called statistical manifolds that are tied to probability distributions.

Integral calculus is a part of calculus that deals with integralss, unlike differential calculus.

Integral geometry studies measures in space that stay the same even when the space is moved or turned.

Intersection theory is a part of both algebraic geometry and algebraic topology.

Intuitionistic type theory is a way to build the foundations of mathematics.

Invariant theory examines how functions change — or don’t change — when group actions are applied to shapes.

Inventory theory

Inversive geometry studies properties that stay the same after a special kind of transformation called inversion.

Inversive plane geometry is inversive geometry limited to flat, two-dimensional space.

Inversive ring geometry

Itô calculus expands calculus to work with unpredictable processes like Brownian motion, useful in mathematical finance and stochastic differential equations.

Iwasawa theory studies number theory problems over endless chains of number fields.

Iwasawa-Tate theory

J

Job shop scheduling is a way to organize tasks and machines to get work done efficiently. It helps plan when and where each job should be done to save time and resources. This method is often used in factories and workplaces to make sure everything runs smoothly.

Main article: Job shop scheduling

K

K-theory began as a way to study special kinds of shapes called vector bundles over spaces. In topology, it is known as topological K-theory, while in algebra and geometry, it is called algebraic K-theory. K-theory also shows up in some parts of physics, like string theory.

Other related ideas include K-homology, which studies certain properties of spaces, and Kähler geometry, which combines different types of geometry to study special shapes called Kähler manifolds. There is also knot theory, which is part of topology and looks at how knots are formed.

L

L-theory is linked to the K-theory of quadratic forms.

Large deviations theory is a part of probability theory that looks at events that are very unlikely, called tail events. Large sample theory, also known as asymptotic theory, studies lattices which are important in order theory and universal algebra. This includes areas like Lie algebra theory, Lie group theory, and Lie sphere geometry, which is a geometrical theory of planar or spatial geometry focusing on the circle or sphere.

Line geometry and Linear algebra study linear spaces and linear maps, with uses in many areas like abstract algebra. Linear programming is a way to find the best result, like the most profit or least cost, in a mathematical model with linear relationships. There is also a List of graphical methods that includes different ways to show information using diagrams, charts, and plots.

M

Malliavin calculus is a set of math tools that extend calculus of variations to work with stochastic processes.

Mathematical biology uses mathematical modeling to study living things. Mathematical chemistry uses the same kind of modeling for chemical reactions. Mathematical economics applies math to understand economic ideas, while mathematical finance uses applied mathematics to model financial markets.

Mathematical logic looks at how formal logic can be used in math. Mathematical optimization and mathematical physics develop math methods to solve physics problems. Mathematical psychology uses mathematical modeling to study how people think and act. Mathematical sciences includes areas like statistics, cryptography, game theory, and actuarial science.

Mathematical sociology uses math to build theories about society. Mathematical statistics uses probability theory to work with data. Matrix algebra, matrix calculus, and matrix theory are all about matrices, which are tables of numbers used in many areas of math.

N

Neutral geometry is related to absolute geometry.

Nevanlinna theory is a part of complex analysis that looks at how meromorphic functions behave, named after Rolf Nevanlinna.

Nielsen theory is an area of math that started from fixed point topology and was developed by Jakob Nielsen.

Non-abelian class field theory, Non-classical analysis, Non-Euclidean geometry, Non-standard analysis, Non-standard calculus, and Nonarchimedean dynamics (also called p-adic analysis or local arithmetic dynamics) are all special areas of math study.

Noncommutative algebra includes Noncommutative algebraic geometry, which is a part of noncommutative geometry that looks at the geometric properties of certain math objects.

Noncommutative geometry and Noncommutative harmonic analysis (see representation theory) and Noncommutative topology are all areas of math research.

Nonlinear analysis and Nonlinear functional analysis are fields that study complex mathematical functions.

Number theory is a branch of pure mathematics that mainly studies the integers. It was originally called arithmetic or higher arithmetic.

Numerical analysis and Numerical linear algebra are important areas of math used for solving problems with numbers.

O

Operad theory is a part of algebra that studies basic structures in other types of algebra, called algebras. Operation research looks at ways to make processes work better. Operator K-theory and Operator theory are parts of functional analysis that focus on special math objects called operators. Optimal control theory extends ideas from the calculus of variations. Optimal maintenance deals with keeping things working best. Orbifold theory is another area of abstract math. Order theory studies how things can be arranged using connections called binary relations. Ordered geometry is a type of geometry that doesn’t measure distances but looks at how points sit between each other. It helps connect affine geometry, absolute geometry, and hyperbolic geometry. Oscillation theory is also a part of mathematics.

P

p-adic analysis is a part of number theory that looks at functions using special numbers called p-adic numbers. p-adic dynamics uses these ideas to study certain types of equations. Paraconsistent mathematics is an interesting area that tries to build math using different rules than usual.

Other areas include partition theory, perturbation theory, and plane geometry, which focuses on shapes and spaces we can imagine. Polyhedral combinatorics studies the shapes of simple 3D figures, while probability theory deals with chance and likelihood. Projective geometry looks at properties of shapes that stay the same even when we change how we view them. Pure mathematics is all about studying ideas that don’t need real-world examples.

Q

Quantum calculus is a special kind of calculus that does not use the idea of limits.

Quantum geometry extends geometry to help explain the strange behaviors seen in the tiny world of quantum physics. Quaternionic analysis is another area of mathematics that studies numbers in a unique way.

R

Ramsey theory looks at when order must appear, named after Frank P. Ramsey.

Rational geometry studies parts of algebra related to real algebraic geometry.

Real algebraic geometry focuses on real points in algebraic shapes.

Real analysis is a type of math that studies real numbers and their functions, exploring ideas like continuity and smoothness. It also extends these ideas to complex numbers in complex analysis.

Recreational mathematics is fun math, including mathematical puzzles and mathematical games.

Representation theory studies algebraic structures by showing their elements as linear transformations of vector spaces.

Ribbon theory is a part of topology that looks at ribbons.

Ricci calculus, also called absolute differential calculus, is a foundation of tensor calculus, created by Gregorio Ricci-Curbastro and used in general relativity and differential geometry.

Riemannian geometry studies special spaces called Riemannian manifolds, expanding ideas from regular geometry, analysis, and calculus. It is named after Bernhard Riemann.

S

Sampling theory

Scheme theory

the study of schemes introduced by Alexander Grothendieck. It helps us understand shapes using special tools called sheaves.

Secondary calculus

Semialgebraic geometry

a part of geometry that looks at special sets of points.

Set-theoretic topology

Set theory

Sheaf theory

This looks at how small and large parts of shapes are connected.

Sheaf cohomology

Sieve theory

Single operator theory

studies the properties of single operations.

Singularity theory

a part of geometry that looks at where shapes can break or change suddenly.

Smooth infinitesimal analysis

a careful way to study very tiny changes using special math tools.

Solid geometry

Spatial geometry

Spectral geometry

studies how the shapes of objects relate to their natural vibrations.

Spectral graph theory

looks at the properties of networks using tools from matrices.

Spectral theory

part of operator theory that extends ideas of special numbers and directions from simple math to more complex systems.

Spectral theory of ordinary differential equations

part of spectral theory that studies solutions to certain equations.

Spectrum continuation analysis

extends the idea of breaking functions into patterns to those that are not repeating.

Spherical geometry

a branch of geometry that studies the surface of a sphere.

Spherical trigonometry

a part of spherical geometry that studies shapes on the surface of a sphere, usually triangles.

Statistical mechanics

Statistical modelling

Statistical theory

Statistics

the math used to study patterns and chances. This includes probability theory.

Steganography

Stochastic calculus

Stochastic calculus of variations

Stochastic geometry

the study of random patterns of points.

Stochastic process

Stratified Morse theory

Super linear algebra

Surgery theory

a part of geometry that changes one shape into another in a controlled way.

Survey sampling

Survey methodology

Symbolic computation

also known as algebraic computation. It is about working with math expressions using symbols, not just numbers.

Symbolic dynamics

Symplectic geometry

a branch of geometry and topology that studies special kinds of shapes.

Symplectic topology

Synthetic differential geometry

a new way to look at shapes using special logic and language.

Synthetic geometry

also known as axiomatic geometry. It is a branch of geometry that uses basic rules and logical thinking to learn about shapes.

Systolic geometry

a branch of geometry that studies special measurements of shapes and solids.

Systolic hyperbolic geometry

the study of special lines in curved geometry.

T

Tensor algebra, Tensor analysis, Tensor calculus, Tensor theory study and use tensors, which are like general versions of vectors. A tensor algebra is a special kind of math structure used to define tensors.

Tessellation refers to patterns where tiles repeat over and over.

Theoretical physics is a part of science that uses math to explain and predict how things happen in the world.

Theory of computation, Time-scale calculus, and Topology are all areas that explore different mathematical ideas and problem-solving methods.

Topological combinatorics uses ideas from topology to solve problems in organizing and counting.

Topological degree theory, Topological graph theory, Topological K-theory, and Topos theory are all branches of topology that look at different mathematical structures.

Toric geometry and Transcendental number theory study special kinds of numbers and shapes.

Transformation geometry looks at how shapes change when moved or turned.

Trigonometry is the study of triangles and how their sides and angles are related, which is important in many areas of math.

Tropical analysis is another name for idempotent analysis.

Tropical geometry, Twisted K-theory, and Type theory are advanced areas of math that connect different branches of the subject.

U

The umbral calculus is a special way of studying something called Sheffer sequences. Uncertainty theory is a new part of mathematics that focuses on ideas like normality and how things change step by step.

Universal algebra looks at the basic rules that shape different mathematical structures. Universal hyperbolic trigonometry is a way to understand curved space using ideas from rational geometry.

Main article: Umbral calculus
Main articles: Universal algebra, Universal hyperbolic trigonometry

V

Valuation theory

Variational analysis

Vector algebra is a part of linear algebra that focuses on adding vectors and multiplying them by numbers. It also includes special operations like the dot product and cross product, and is different from geometric algebra, which works in more than three dimensions.

Vector analysis, also called vector calculus, is a part of multivariable calculus. It studies how vector fields change and combine in three-dimensional space, using methods like differentiation and integration.

Vector calculus

W

Wavelets

Wavelets are special tools used in mathematics to look at data in different ways. They help us see patterns and details that might be hard to notice otherwise, like zooming in and out on a picture. These tools are useful in many areas, such as studying sound, images, and other types of information.

Related articles

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