Nodes at W0, stub

A tag, a kind, a name, an inventory row, and a same_as or a source.

Ideas 7651–7800 of 8415.

Name	Kind	Subject
Intersection form	Concept	Manifolds and cell complexes
Nil ideal	Definition	Associative rings and algebras
Alexander polynomial	Definition	Manifolds and cell complexes
Unirational variety	Definition	Algebraic geometry
Pseudocompact space	Definition	General topology
Nonstandard analysis	Concept	Real functions
Sequential space	Concept	General topology
Baker's theorem	Theorem	Number theory
Corona theorem	Theorem	Functions of a complex variable
Luzin N property	Concept	Real functions
Regular category	Definition	Category theory; homological algebra
Pseudocomplement	Concept	Order, lattices, ordered algebraic structures
Richardson extrapolation	Concept	Numerical analysis
Riemann–Roch theorem	Theorem	Algebraic geometry
Wirtinger derivatives	Concept	Functions of a complex variable
Morley rank	Concept	Mathematical logic and foundations
Series in Banach spaces	Concept	Sequences, series, summability
Divisor class group	Concept	Commutative algebra
Lattice (group)	Concept	Number theory
Stopping time	Concept	Probability theory and stochastic processes
Feder–Vardi dichotomy conjecture	Conjecture	Computer science
Galois theory	Concept	Field theory and polynomials
Contact manifold	Definition	Differential geometry
Category of sets	Example	Category theory; homological algebra
Whitehead product	Definition	Algebraic topology
Free lattice	Concept	Order, lattices, ordered algebraic structures
Robertson–Seymour theorem	Theorem	Combinatorics
Penrose–Hawking singularity theorems	Theorem	Relativity and gravitational theory
Essential supremum	Concept	Measure and integration
Field trace	Concept	Field theory and polynomials
Hilbert's fifteenth problem	Problem	Algebraic geometry
Stieltjes function	Concept	Real functions
Gödel's completeness theorem	Theorem	Mathematical logic and foundations
Ideal class group	Concept	Number theory
Chain complex	Concept	Category theory; homological algebra
Easton's theorem	Theorem	Mathematical logic and foundations
Metacompact space	Concept	General topology
McKay conjecture	Theorem	Group theory and generalizations
Tight and overtwisted contact structures	Concept	Manifolds and cell complexes
Null-homotopic map	Definition	Algebraic topology
Finitely generated algebra	Concept	General algebraic systems
Kolmogorov extension theorem	Theorem	Probability theory and stochastic processes
Maximal order	Definition	Associative rings and algebras
Quasivariety	Concept	General algebraic systems
Bridge number	Definition	Manifolds and cell complexes
Linear and stable summation methods	Definition	Sequences, series, summability
Mean-field game	Concept	Game theory, economics, finance, and other social and behavioral sciences
Menger sponge	Example	General topology
Henselian ring	Definition	Commutative algebra
Lebesgue's density theorem	Theorem	Measure and integration
Classifying space	Concept	Algebraic topology
Euler transform	Concept	Sequences, series, summability
G-structure	Definition	Differential geometry
Inverse scattering transform	Definition	Dynamical systems and ergodic theory
Diffeomorphism group	Example	Global analysis, analysis on manifolds
Cobordism	Definition	Manifolds and cell complexes
Forgetful functor	Concept	Category theory; homological algebra
Pseudovariety	Definition	General algebraic systems
Commutative diagram	Concept	Category theory; homological algebra
Riemann–Lebesgue lemma	Theorem	Harmonic analysis on Euclidean spaces
Bézout domain	Definition	Commutative algebra
Riesz–Fischer theorem	Theorem	Functional analysis
Schottky group	Definition	Functions of a complex variable
GAGA	Theorem	Several complex variables and analytic spaces
Medial magma	Definition	Group theory and generalizations
Fubini's theorem for series	Theorem	Sequences, series, summability
Kullback–Leibler divergence	Definition	Information and communication theory, circuits
Simplicial set	Concept	Category theory; homological algebra
Hilbert class field	Concept	Number theory
Closed immersion	Concept	Algebraic geometry
Section of a vector bundle	Concept	Algebraic topology
Wang sequence	Theorem	Algebraic topology
Invariant set	Concept	Ordinary differential equations
Koebe quarter theorem	Theorem	Functions of a complex variable
Borromean rings	Example	Manifolds and cell complexes
Tensor field	Concept	Differential geometry
Algebraic number field	Definition	Number theory
Euler's thirty-six officers problem	Problem	Combinatorics
Pseudocomplement	Definition	Order, lattices, ordered algebraic structures
Yoneda Ext and extensions	Theorem	Category theory; homological algebra
Tangent bundle	Concept	Global analysis, analysis on manifolds
Proximity space	Concept	General topology
Brill–Noether theory	Definition	Algebraic geometry
Group representation	Concept	Group theory and generalizations
Vitali set	Counterexample	Measure and integration
Majorization	Definition	Real functions
Lorenz system	Example	Ordinary differential equations
Minkowski–Bouligand dimension	Concept	Measure and integration
Kernel	Definition	Category theory; homological algebra
Locally finite variety	Definition	General algebraic systems
Girth	Definition	Combinatorics
Fiber of a morphism	Definition	Algebraic geometry
Cauchy filter	Concept	General topology
Maximal chain	Definition	Order, lattices, ordered algebraic structures
Lie symmetry method	Definition	Ordinary differential equations
Cut locus	Definition	Differential geometry
Continuous group homomorphism	Definition	Topological groups, Lie groups
Resolvent set	Concept	Operator theory
Borel conjecture	Conjecture	Manifolds and cell complexes
Matrix multiplication exponent	Problem	Computer science
Maurer–Cartan form	Definition	Topological groups, Lie groups
Convergence along an ultrafilter	Definition	General topology
Error-correcting code	Definition	Information and communication theory, circuits
Knot Floer homology	Definition	Manifolds and cell complexes
Symplectic group	Object	Group theory and generalizations
Computability theory	Concept	Mathematical logic and foundations
Dispersive partial differential equation	Definition	Partial differential equations
Large cardinal	Concept	Mathematical logic and foundations
Schreier coset graph	Definition	Group theory and generalizations
Analytic capacity	Definition	Functions of a complex variable
Stable ∞-category	Concept	Category theory; homological algebra
Complex torus	Definition	Algebraic geometry
Separated morphism	Concept	Algebraic geometry
Formally real field	Concept	Field theory and polynomials
Ordered vector space	Definition	Functional analysis
Semilinear PDE	Definition	Partial differential equations
Lie symmetry method	Concept	Ordinary differential equations
Hearing the shape of a drum	Problem	Global analysis, analysis on manifolds
Exotic R4	Object	Manifolds and cell complexes
Center manifold	Concept	Ordinary differential equations
Quadratic variation	Concept	Probability theory and stochastic processes
Calabi–Weil rigidity	Corollary	Differential geometry
Schur's lemma	Lemma	Associative rings and algebras
Mittag-Leffler's theorem	Theorem	Functions of a complex variable
Compositum of fields	Definition	Field theory and polynomials
Rees matrix semigroup	Concept	Group theory and generalizations
Algorithmic randomness	Definition	Mathematical logic and foundations
Nörlund mean	Concept	Sequences, series, summability
Cut locus	Concept	Differential geometry
Abel–Dini theorem	Theorem	Sequences, series, summability
Differentiable curve	Definition	Differential geometry
Finite ring	Concept	Associative rings and algebras
Localization at a prime ideal	Concept	Commutative algebra
Rough path	Concept	Probability theory and stochastic processes
Upper half-plane	Object	Functions of a complex variable
Inner-outer factorization	Theorem	Functions of a complex variable
Spectral theorem for bounded normal operators	Theorem	Operator theory
Robbins conjecture	Theorem	Order, lattices, ordered algebraic structures
Rack and quandle	Concept	Manifolds and cell complexes
Integrable function	Concept	Measure and integration
Finite difference method	Concept	Numerical analysis
Artin's theorem on fixed fields	Theorem	Field theory and polynomials
Bondy's theorem	Theorem	Combinatorics
Lie algebra of a compact group is reductive	Theorem	Topological groups, Lie groups
Marsden–Weinstein reduction	Definition	Differential geometry
Summability method	Definition	Sequences, series, summability
Chern–Simons form	Concept	Differential geometry
Integral element	Definition	Commutative algebra
Baker–Campbell–Hausdorff formula	Theorem	Topological groups, Lie groups
Mayer–Vietoris sequence	Theorem	Algebraic topology