Every idea

Ideas 10801–10950 of 11985.

Name	Kind	Subject
Tricomi confluent hypergeometric function	Definition	Special functions
Amitsur's theorem on the radical of polynomial rings	Theorem	Associative rings and algebras
Perfect field	Concept	Field theory and polynomials
Exponential type	Definition	Functions of a complex variable
Binomial proportion confidence interval	Definition	Statistics
Gelfand transform	Concept	Functional analysis
Routh's theorem	Theorem	Geometry
Holonomy	Definition	Differential geometry
Tensor decomposition	Concept	Linear and multilinear algebra; matrix theory
Comma category	Definition	Category theory; homological algebra
Hardy–Littlewood maximal function	Concept	Harmonic analysis on Euclidean spaces
Interpolation space	Concept	Functional analysis
Strong operator topology	Definition	Operator theory
Exact couple	Concept	Algebraic topology
Unknotting problem	Problem	Manifolds and cell complexes
Stable distribution	Definition	Probability theory and stochastic processes
Haar measure	Concept	Measure and integration
Exponential stability	Concept	Ordinary differential equations
Spherical code	Definition	Convex and discrete geometry
Lax–Friedrichs method	Concept	Numerical analysis
Boolean algebras canonically defined	Concept	Order, lattices, ordered algebraic structures
Synthetic geometry	Concept	Geometry
CUSUM	Definition	Statistics
G-structure	Concept	Differential geometry
Hausdorff dimension	Definition	Measure and integration
Macdonald polynomial	Concept	Combinatorics
Graph minor	Concept	Combinatorics
Function field of a variety	Definition	Algebraic geometry
Trefoil knot	Example	Manifolds and cell complexes
Transfer homomorphism	Definition	Group theory and generalizations
Herbrand's theorem	Theorem	Mathematical logic and foundations
Pseudoanalytic function	Definition	Functions of a complex variable
Ehresmann connection	Definition	Differential geometry
Medial magma	Concept	Group theory and generalizations
Boolean product	Definition	General algebraic systems
Cascade algorithm	Concept	Numerical analysis
Germ	Concept	General topology
Quasi-compact morphism	Definition	Algebraic geometry
Lévy's upward theorem	Theorem	Probability theory and stochastic processes
Canonical bundle	Concept	Algebraic geometry
Well-posed problem	Concept	Partial differential equations
Universally closed morphism	Concept	Algebraic geometry
Whittle likelihood	Concept	Statistics
Helmholtz equation	Definition	Partial differential equations
Projective subspace	Definition	Geometry
Toyoda–Bruck theorem	Theorem	Group theory and generalizations
Quartic reciprocity	Theorem	Number theory
Schwarz's list	Theorem	Special functions
Pappus configuration	Example	Combinatorics
Free spectrum of a variety	Concept	General algebraic systems
Nonassociative ring	Definition	Nonassociative rings and algebras
Cup product	Definition	Algebraic topology
Completion of a valued field	Concept	Field theory and polynomials
Mackey topology	Concept	Functional analysis
De Finetti's theorem	Theorem	Probability theory and stochastic processes
Poisson kernel	Definition	Potential theory
Inertial manifold	Concept	Dynamical systems and ergodic theory
Doubling measure	Concept	Measure and integration
Coproduct	Definition	Category theory; homological algebra
Properly discontinuous action	Definition	Manifolds and cell complexes
Wreath product	Concept	Group theory and generalizations
Harris inequality	Theorem	Probability theory and stochastic processes
Finitely generated algebra	Definition	General algebraic systems
Feynman–Kac formula	Theorem	Probability theory and stochastic processes
Serre's criterion for normality	Theorem	Commutative algebra
Hopkins–Levitzki theorem	Theorem	Associative rings and algebras
Intermittency	Concept	Dynamical systems and ergodic theory
Dunford–Pettis property	Definition	Functional analysis
Gelfand pair	Concept	Abstract harmonic analysis
Exceptional collection	Definition	Algebraic geometry
Consistency of summability methods	Concept	Sequences, series, summability
Dandelin spheres	Concept	Geometry
Riesz transform	Definition	Harmonic analysis on Euclidean spaces
Matrix norm	Definition	Linear and multilinear algebra; matrix theory
Fundamental theorem of affine geometry	Theorem	Geometry
Jacobi elliptic functions	Definition	Special functions
Elementary theory of the category of sets	Concept	Category theory; homological algebra
Proof of Lagrange's theorem	Proof	Group theory and generalizations
Coherent ring	Concept	Commutative algebra
Fixed point	Definition	Dynamical systems and ergodic theory
Class	Definition	Mathematical logic and foundations
Jakobson's theorem	Theorem	Dynamical systems and ergodic theory
Cellular homology	Concept	Algebraic topology
Split exact sequence	Definition	Category theory; homological algebra
Reeb foliation	Example	Manifolds and cell complexes
Packing measure	Concept	Measure and integration
Lusternik–Schnirelmann category	Concept	Algebraic topology
Balog–Szemerédi–Gowers theorem	Theorem	Number theory
Canonical module	Concept	Commutative algebra
Symplectic vector space	Definition	Linear and multilinear algebra; matrix theory
Zero-dimensional space	Definition	General topology
Natural duality	Concept	General algebraic systems
Cofibration	Concept	Algebraic topology
Existence of transcendence bases	Theorem	Field theory and polynomials
Five lemma	Lemma	Category theory; homological algebra
Euler summation	Definition	Sequences, series, summability
Tennenbaum's theorem	Theorem	Mathematical logic and foundations
Kummer's equation	Definition	Special functions
Prüfer domain	Definition	Commutative algebra
Turing machine	Definition	Mathematical logic and foundations
d'Alembert's equation	Example	Ordinary differential equations
Composition operator	Definition	Operator theory
Quaternion-Kähler manifold	Definition	Differential geometry
Schrödinger operator	Definition	Ordinary differential equations
Cerf theory	Concept	Manifolds and cell complexes
Chow group	Definition	Algebraic geometry
Legendre's equation	Example	Ordinary differential equations
Sequent calculus	Concept	Mathematical logic and foundations
Dirichlet-to-Neumann operator	Concept	Partial differential equations
Matrix function	Concept	Linear and multilinear algebra; matrix theory
Unary operation	Definition	General algebraic systems
Baum–Welch algorithm	Concept	Statistics
Eichler order	Concept	Number theory
Stiefel manifold	Example	Algebraic topology
Sturm comparison theorem	Theorem	Ordinary differential equations
Universal algebra	Concept	General algebraic systems
Finite lattice representation problem	Problem	Order, lattices, ordered algebraic structures
Tensor rank	Concept	Linear and multilinear algebra; matrix theory
Dehn twist	Concept	Manifolds and cell complexes
Linear extension	Concept	Order, lattices, ordered algebraic structures
False discovery rate and the Benjamini–Hochberg procedure	Definition	Statistics
Lambert summation	Concept	Sequences, series, summability
Impossibility of the classical construction problems	Theorem	Field theory and polynomials
H-representation and V-representation	Concept	Convex and discrete geometry
Prime ideals of a localization	Proposition	Commutative algebra
Particle filter	Definition	Statistics
Sinai–Ruelle–Bowen measure	Definition	Dynamical systems and ergodic theory
Hypergeometric differential equation	Concept	Special functions
Weak derivative	Definition	Functional analysis
Tube lemma	Lemma	General topology
Term operation	Definition	General algebraic systems
Rees algebra	Concept	Commutative algebra
Frobenius method	Concept	Ordinary differential equations
Completely distributive lattice	Definition	Order, lattices, ordered algebraic structures
Hamiltonian vector field	Definition	Differential geometry
Enumerative geometry	Definition	Algebraic geometry
Besicovitch set of measure zero	Example	Measure and integration
Kaplan–Meier estimator	Definition	Statistics
Stopping time	Definition	Probability theory and stochastic processes
Nielsen–Schreier theorem	Theorem	Group theory and generalizations
Néron model	Definition	Algebraic geometry
End and coend	Concept	Category theory; homological algebra
Geometric graph	Definition	Combinatorics
Cantor space	Object	General topology
Sieve	Definition	Category theory; homological algebra
de Rham cohomology	Definition	Global analysis, analysis on manifolds
Fully faithful essentially surjective functor is an equivalence	Theorem	Category theory; homological algebra
Sidon set	Definition	Number theory
Classifying space of a group	Concept	Algebraic topology
Cameron–Martin theorem	Theorem	Measure and integration