Every idea

Ideas 9601–9750 of 10181.

Name	Kind	Subject
Nagata ring	Definition	Commutative algebra
Brauer–Manin obstruction	Concept	Algebraic geometry
Section of a vector bundle	Definition	Algebraic topology
Face lattice	Example	Convex and discrete geometry
Lebesgue–Stieltjes measure	Definition	Measure and integration
Square root of a matrix	Definition	Linear and multilinear algebra; matrix theory
Siegel–Walfisz theorem	Theorem	Number theory
F-sigma set	Definition	General topology
Leech lattice	Object	Number theory
Superalgebra	Definition	Nonassociative rings and algebras
Naive set theory	Concept	Mathematical logic and foundations
Colimit	Definition	Category theory; homological algebra
Regular semigroup	Concept	Group theory and generalizations
Colombeau algebra	Concept	Functional analysis
Analytic combinatorics	Definition	Combinatorics
Elliptic cohomology	Concept	Algebraic topology
Train track	Concept	Manifolds and cell complexes
Geometric realization	Definition	Algebraic topology
Skorokhod's embedding theorem	Theorem	Probability theory and stochastic processes
Interacting particle system	Definition	Probability theory and stochastic processes
Separated morphism	Definition	Algebraic geometry
Gleason–Yamabe theorem	Theorem	Topological groups, Lie groups
Algebraic curve	Concept	Algebraic geometry
p-Laplacian	Concept	Partial differential equations
Eilenberg–MacLane spectrum	Object	Algebraic topology
Semisimple Lie group	Concept	Topological groups, Lie groups
Abelian algebra	Definition	General algebraic systems
Frobenius's theorem on Frobenius kernels	Theorem	Group theory and generalizations
Hilbert scheme	Object	Algebraic geometry
Galois insertion	Definition	Order, lattices, ordered algebraic structures
Exchangeable random variables	Definition	Probability theory and stochastic processes
Function field	Concept	Field theory and polynomials
Empirical process	Concept	Probability theory and stochastic processes
Quillen adjunction	Definition	Category theory; homological algebra
Cohomological dimension of a field	Definition	Field theory and polynomials
Prime end	Definition	Functions of a complex variable
Grunsky matrix	Concept	Functions of a complex variable
Pentagon identity	Fact	Category theory; homological algebra
Equidistribution modulo one	Concept	Number theory
Hilbert's theorem on the hyperbolic plane	Theorem	Differential geometry
AKS primality test	Theorem	Number theory
Associated bundle	Definition	Algebraic topology
Triangle removal lemma	Lemma	Combinatorics
Bounded gaps between primes	Theorem	Number theory
Néron–Severi group	Concept	Algebraic geometry
Hyperbolic conservation law	Concept	Partial differential equations
Substitution	Definition	Mathematical logic and foundations
Torus as a group	Example	Topological groups, Lie groups
Sumset	Concept	Number theory
Factorization of polynomials over finite fields	Concept	Number theory
Hemicontinuity	Concept	General topology
Dirac equation	Concept	Partial differential equations
Dehn twist	Definition	Manifolds and cell complexes
Branch point	Concept	Functions of a complex variable
Polynomial operation	Concept	General algebraic systems
Nuclear operator	Concept	Operator theory
Nesbitt's inequality	Proposition	Real functions
Unimodular group	Definition	Topological groups, Lie groups
Contraction semigroup	Concept	Operator theory
Hyperbolic partial differential equation	Definition	Partial differential equations
Intuitionism	Concept	Mathematical logic and foundations
Hochschild homology	Definition	Associative rings and algebras
Goodstein's theorem	Theorem	Mathematical logic and foundations
Pseudo-differential operator	Definition	Partial differential equations
Ideal completion	Definition	Order, lattices, ordered algebraic structures
Hodge index theorem	Theorem	Algebraic geometry
Finiteness of associated primes	Theorem	Commutative algebra
Pseudovariety	Concept	General algebraic systems
Graph reconstruction conjecture	Conjecture	Combinatorics
Descending chain condition	Definition	Order, lattices, ordered algebraic structures
Separable degree	Definition	Field theory and polynomials
Cyclic term theorem	Theorem	General algebraic systems
Shilov boundary	Definition	Functional analysis
Amalgamation property	Concept	Mathematical logic and foundations
Manin conjecture	Conjecture	Algebraic geometry
System of parameters	Definition	Commutative algebra
Dirichlet process	Concept	Probability theory and stochastic processes
Jordan–Schur theorem	Theorem	Group theory and generalizations
Homology with coefficients	Concept	Algebraic topology
Weyl–Titchmarsh theory	Concept	Ordinary differential equations
Rational variety	Concept	Algebraic geometry
Lebesgue integral	Definition	Measure and integration
Well-powered category	Concept	Category theory; homological algebra
Kruskal's tree theorem	Theorem	Combinatorics
Gromov–Witten invariant	Concept	Algebraic geometry
Cardinal function	Concept	General topology
Semiprimary ring	Concept	Associative rings and algebras
Disk algebra	Definition	Functional analysis
Schramm–Loewner evolution	Definition	Probability theory and stochastic processes
Étale morphism	Definition	Algebraic geometry
Burnside problem	Problem	Group theory and generalizations
Numerical range	Concept	Operator theory
Enriched category	Definition	Category theory; homological algebra
Kontsevich formality theorem	Theorem	Differential geometry
Factorization of polynomials over finite fields	Definition	Number theory
Spectrum of an operator	Definition	Operator theory
Tilting theory	Concept	Associative rings and algebras
Knot concordance	Definition	Manifolds and cell complexes
Automorphism	Definition	General algebraic systems
Elliptic operator	Concept	Operator theory
Day convolution	Definition	Category theory; homological algebra
Umbilical point	Concept	Differential geometry
Sequence space	Concept	Functional analysis
List of small groups	Example	Group theory and generalizations
Conservation law	Definition	Partial differential equations
Skeleton of a category	Definition	Category theory; homological algebra
Generalized mean inequality	Theorem	Real functions
Morphism	Definition	Category theory; homological algebra
Toric ideal	Concept	Commutative algebra
Erdős–Stone theorem	Theorem	Combinatorics
Homotopy equivalence	Concept	Algebraic topology
Kummer theory	Concept	Number theory
Tight closure	Definition	Commutative algebra
Primitive recursive function	Definition	Mathematical logic and foundations
Hardy space	Definition	Functions of a complex variable
Finite-dimensional distributions	Concept	Probability theory and stochastic processes
Involution	Definition	General algebraic systems
Tannery's theorem	Theorem	Sequences, series, summability
Connected sum	Concept	Manifolds and cell complexes
Toric ideal	Definition	Commutative algebra
Invertible operator	Definition	Operator theory
Percolation threshold	Definition	Probability theory and stochastic processes
Primitive permutation group	Concept	Group theory and generalizations
Robin boundary condition	Definition	Ordinary differential equations
Monotone operator	Concept	Operator theory
Vlasov equation	Definition	Partial differential equations
Pseudoanalytic function	Concept	Functions of a complex variable
Priority method	Definition	Mathematical logic and foundations
Group ring	Definition	Associative rings and algebras
Full subcategory	Definition	Category theory; homological algebra
q-Pochhammer symbol	Concept	Combinatorics
Universal cover	Concept	Manifolds and cell complexes
Mal'cev term	Concept	General algebraic systems
Orders of the elements of S3	Example	Group theory and generalizations
Algebraic K-theory of schemes	Concept	K-theory
Covering space	Definition	Manifolds and cell complexes
Borg–Marchenko uniqueness theorem	Theorem	Ordinary differential equations
Monomorphism	Concept	Category theory; homological algebra
Homotopy principle	Concept	Global analysis, analysis on manifolds
Iwasawa theory	Concept	Number theory
Finitely presented algebra	Definition	Commutative algebra
Enriques surface	Concept	Algebraic geometry
Curvature form	Definition	Differential geometry
Henstock–Kurzweil integral	Definition	Real functions
Fisher–Tippett–Gnedenko theorem	Theorem	Probability theory and stochastic processes
Evolute	Concept	Differential geometry
Serre's finiteness theorem	Theorem	Algebraic topology
Class	Concept	Mathematical logic and foundations
Multialgebra	Definition	General algebraic systems
Sauer–Shelah lemma	Lemma	Combinatorics