Concepts

A mathematical idea. It can have more than one definition.

Ideas 1351–1500 of 2778.

Name	Kind	Subject
Exchangeable random variables	Concept	Probability theory and stochastic processes
Sober space	Concept	General topology
Nerve of a cover	Concept	Algebraic topology
Borel hierarchy	Concept	Mathematical logic and foundations
Ext functor	Concept	Commutative algebra
Weak homotopy equivalence	Concept	Algebraic topology
Axiom of constructibility	Concept	Mathematical logic and foundations
Bornological space	Concept	Functional analysis
Buchberger's algorithm	Concept	Commutative algebra
Jones polynomial	Concept	Manifolds and cell complexes
Nilpotency class	Concept	Group theory and generalizations
Field of rational functions	Concept	Field theory and polynomials
Approximate derivative	Concept	Real functions
Pi-system	Concept	Measure and integration
Matroid minor	Concept	Combinatorics
Weak operator topology	Concept	Operator theory
Finite model theory	Concept	Mathematical logic and foundations
Arithmetic group	Concept	Group theory and generalizations
Approximately finite-dimensional C*-algebra	Concept	Functional analysis
Capacity of a set	Concept	Potential theory
Loewner differential equation	Concept	Functions of a complex variable
Selberg sieve	Concept	Number theory
Schauder basis	Concept	Functional analysis
Stable homotopy theory	Concept	Algebraic topology
Matrix norm	Concept	Linear and multilinear algebra; matrix theory
Geodesic curvature	Concept	Differential geometry
Measure-preserving transformation	Concept	Measure and integration
Indecomposable continuum	Concept	General topology
Robin boundary condition	Concept	Ordinary differential equations
Polish space	Concept	General topology
Extension and contraction of ideals	Concept	Commutative algebra
Killing vector field	Concept	Differential geometry
Neutral differential equation	Concept	Ordinary differential equations
Complex cobordism	Concept	Algebraic topology
Covariant derivative	Concept	Differential geometry
Totally positive matrix	Concept	Linear and multilinear algebra; matrix theory
Spectral graph theory	Concept	Combinatorics
Wedge sum	Concept	General topology
Riemann surface	Concept	Functions of a complex variable
Majorization	Concept	Real functions
Thom space	Concept	Algebraic topology
Primitive recursive function	Concept	Mathematical logic and foundations
Knot Floer homology	Concept	Manifolds and cell complexes
Logicism	Concept	Mathematical logic and foundations
Eulerian number	Concept	Combinatorics
Fourier transform of tempered distributions	Concept	Functional analysis
Finsler manifold	Concept	Differential geometry
Siegel zero	Concept	Number theory
CW complex	Concept	Manifolds and cell complexes
Universally catenary ring	Concept	Commutative algebra
Maximum and minimum	Concept	Real functions
Inverse mean curvature flow	Concept	Differential geometry
Oscillation of a function	Concept	Real functions
Connection on a vector bundle	Concept	Differential geometry
Regular surface	Concept	Differential geometry
Generator of a semigroup	Concept	Operator theory
Turing jump	Concept	Mathematical logic and foundations
Poincaré map	Concept	Dynamical systems and ergodic theory
Perfect set	Concept	General topology
Global field	Concept	Number theory
Square root of a matrix	Concept	Linear and multilinear algebra; matrix theory
Regular local ring	Concept	Commutative algebra
Finite measure	Concept	Measure and integration
Monogenic function	Concept	Functions of a complex variable
Max-plus algebra	Concept	Linear and multilinear algebra; matrix theory
Complete theory	Concept	Mathematical logic and foundations
Cardinal characteristics of the continuum	Concept	Mathematical logic and foundations
Reflexive operator algebra	Concept	Operator theory
Substructure	Concept	Mathematical logic and foundations
Projective tensor product	Concept	Functional analysis
One-relator group	Concept	Group theory and generalizations
Localization of a module	Concept	Commutative algebra
Lie bracket of vector fields	Concept	Global analysis, analysis on manifolds
Moore space	Concept	General topology
Mori domain	Concept	Commutative algebra
Regular sequence	Concept	Commutative algebra
Building	Concept	Group theory and generalizations
Right-angled Artin group	Concept	Group theory and generalizations
Term	Concept	Mathematical logic and foundations
Homoclinic orbit	Concept	Ordinary differential equations
Ramanujan tau function	Concept	Number theory
Semi-local ring	Concept	Commutative algebra
Erdős–Rényi model	Concept	Combinatorics
Final topology	Concept	General topology
Kähler–Einstein metric	Concept	Several complex variables and analytic spaces
Quasi-isometry	Concept	Group theory and generalizations
Thom spectrum	Concept	Algebraic topology
Hilbert space adjoint	Concept	Operator theory
Product sigma-algebra	Concept	Measure and integration
Schur complement	Concept	Linear and multilinear algebra; matrix theory
Limit-point and limit-circle	Concept	Ordinary differential equations
Local cohomology	Concept	Commutative algebra
Natural deduction	Concept	Mathematical logic and foundations
Bass–Serre theory	Concept	Group theory and generalizations
Submartingale	Concept	Probability theory and stochastic processes
Witt vectors	Concept	Commutative algebra
Singular cohomology	Concept	Algebraic topology
Incompressible surface	Concept	Manifolds and cell complexes
Amenable Banach algebra	Concept	Functional analysis
Differential of a smooth map	Concept	Global analysis, analysis on manifolds
Torsion submodule	Concept	Commutative algebra
Aleph number	Concept	Mathematical logic and foundations
Dual matroid	Concept	Combinatorics
Linear topology	Concept	Commutative algebra
Immersion	Concept	Manifolds and cell complexes
Rigged Hilbert space	Concept	Functional analysis
Krylov–Bogolyubov averaging	Concept	Ordinary differential equations
Homology manifold	Concept	Manifolds and cell complexes
Young measure	Concept	Calculus of variations and optimal control; optimization
Caputo fractional derivative	Concept	Real functions
Ring of invariants	Concept	Commutative algebra
Wynn's epsilon algorithm	Concept	Numerical analysis
Normal closure	Concept	Field theory and polynomials
Homogeneous ideal	Concept	Commutative algebra
Tauberian condition	Concept	Sequences, series, summability
Schwarzian derivative	Concept	Functions of a complex variable
Orientability	Concept	Manifolds and cell complexes
Summation of families over arbitrary index sets	Concept	Sequences, series, summability
Convergence of filters	Concept	General topology
Virtual knot	Concept	Manifolds and cell complexes
Alexandrov space	Concept	Differential geometry
FK-space	Concept	Functional analysis
Kontsevich integral	Concept	Manifolds and cell complexes
Flat module	Concept	Commutative algebra
NIP theory	Concept	Mathematical logic and foundations
Strong Cesàro summability	Concept	Sequences, series, summability
Turing machine	Concept	Mathematical logic and foundations
Classical group	Concept	Group theory and generalizations
Finitely presented algebra	Concept	Commutative algebra
Positive operator	Concept	Operator theory
Real closure	Concept	Field theory and polynomials
Product measure	Concept	Measure and integration
Summability field of a matrix method	Concept	Sequences, series, summability
Brouwer–Heyting–Kolmogorov interpretation	Concept	Mathematical logic and foundations
Darboux function	Concept	Real functions
Steiner system	Concept	Combinatorics
Riemannian manifold	Concept	Differential geometry
Arithmetical hierarchy	Concept	Mathematical logic and foundations
Runge–Kutta methods	Concept	Numerical analysis
Haken manifold	Concept	Manifolds and cell complexes
Manifold with boundary	Concept	Manifolds and cell complexes
Jacobson ring	Concept	Commutative algebra
Quantifier elimination	Concept	Mathematical logic and foundations
Point spectrum	Concept	Operator theory
Schwarz–Christoffel mapping	Concept	Functions of a complex variable
k-vertex-connected graph	Concept	Combinatorics
Characteristic class	Concept	Algebraic topology
Kähler differentials	Concept	Commutative algebra
Curvature of a curve	Concept	Differential geometry
Crystallographic group	Concept	Group theory and generalizations