Every idea

Ideas 4951–5100 of 7806.

Name	Kind	Subject
Covariant derivative	Definition	Differential geometry
Complete intersection ring	Definition	Commutative algebra
Bredon cohomology	Definition	Algebraic topology
Blaschke product	Definition	Functions of a complex variable
Mittag-Leffler star	Concept	Functions of a complex variable
Summability field of a matrix method	Definition	Sequences, series, summability
Strongly regular graph	Concept	Combinatorics
Tauberian condition	Definition	Sequences, series, summability
Random group	Definition	Group theory and generalizations
Wedge sum	Definition	General topology
Borel–Ritt theorem	Theorem	Functions of a complex variable
Cohomology operation	Definition	Algebraic topology
Faithfully flat module	Concept	Commutative algebra
Association scheme	Concept	Combinatorics
Trace class operator	Definition	Operator theory
Vitali convergence theorem	Theorem	Measure and integration
Landau–Kolmogorov inequality	Theorem	Real functions
Modal logic	Concept	Mathematical logic and foundations
Stable theory	Definition	Mathematical logic and foundations
Time-scale calculus	Definition	Real functions
Observability	Concept	Systems theory; control
Differentiable curve	Concept	Differential geometry
Ordinal analysis	Concept	Mathematical logic and foundations
Hamiltonian vector field	Concept	Differential geometry
Projective determinacy	Definition	Mathematical logic and foundations
Tychonoff space	Concept	General topology
Localization of a Noetherian ring is Noetherian	Proposition	Commutative algebra
Algebraic logic	Definition	Mathematical logic and foundations
Simplicial homology	Concept	Algebraic topology
Proof-theoretic ordinal	Concept	Mathematical logic and foundations
Equivariant cohomology	Concept	Algebraic topology
Ideal class group	Definition	Number theory
Boy's surface	Example	Manifolds and cell complexes
Akizuki–Hopkins–Levitzki theorem	Theorem	Commutative algebra
Paraconsistent logic	Concept	Mathematical logic and foundations
Tutte polynomial	Concept	Combinatorics
Hochster's theorem on spectral spaces	Theorem	Algebraic geometry
Gröbner basis	Concept	Commutative algebra
Ramanujan summation	Definition	Sequences, series, summability
Monodromy	Concept	Ordinary differential equations
Borel–Moore homology	Definition	Algebraic topology
Kadison–Singer problem	Problem	Functional analysis
Local time	Definition	Probability theory and stochastic processes
Normal number	Concept	Number theory
Detailed balance	Definition	Probability theory and stochastic processes
Pfaffian	Definition	Linear and multilinear algebra; matrix theory
M-matrix	Definition	Linear and multilinear algebra; matrix theory
Monster group	Object	Group theory and generalizations
Radó's theorem on triangulation of surfaces	Theorem	Manifolds and cell complexes
Witt vectors	Definition	Commutative algebra
Schur complement	Definition	Linear and multilinear algebra; matrix theory
Ultraweak topology	Concept	Functional analysis
Logical connective	Definition	Mathematical logic and foundations
Coupling from the past	Definition	Numerical analysis
Arithmetic group	Definition	Group theory and generalizations
Steinitz's theorem on algebraically closed fields	Theorem	Field theory and polynomials
Irreducible ideal	Definition	Commutative algebra
Symplectic manifold	Concept	Differential geometry
Graded ring	Definition	Commutative algebra
Cohen–Macaulay ring	Definition	Commutative algebra
Method of matched asymptotic expansions	Definition	Ordinary differential equations
Levi-Civita connection	Concept	Differential geometry
q-derivative	Definition	Combinatorics
Krull domain	Concept	Commutative algebra
Exact sequence	Definition	Category theory; homological algebra
Handlebody	Definition	Manifolds and cell complexes
Lyapunov–Schmidt reduction	Definition	Operator theory
Lebesgue–Stieltjes integration	Definition	Real functions
Witt's theorem	Theorem	Number theory
Burali-Forti paradox	Counterexample	Mathematical logic and foundations
Path homotopy	Concept	Algebraic topology
Levi-Civita field	Object	Field theory and polynomials
Treewidth	Concept	Combinatorics
Raabe's test	Theorem	Sequences, series, summability
Clifford analysis	Definition	Functions of a complex variable
Latin square	Concept	Combinatorics
Hidden Markov model	Definition	Statistics
Approximate identity	Concept	Functional analysis
Amenable group	Concept	Abstract harmonic analysis
Formally smooth map	Definition	Commutative algebra
Deformation retract	Concept	General topology
Tietze transformations	Concept	Group theory and generalizations
Group homology	Concept	Group theory and generalizations
Composition operator	Concept	Operator theory
Reduction to diagonal form by transvections	Theorem	Linear and multilinear algebra; matrix theory
Harmonic measure	Concept	Potential theory
Finite-dimensional distributions	Definition	Probability theory and stochastic processes
Continuous mapping theorem	Theorem	Probability theory and stochastic processes
Trigonometric functions	Definition	Special functions
Tensor product of algebras	Definition	Commutative algebra
Jacobi's four-square theorem	Theorem	Number theory
Graph embedding	Concept	Combinatorics
Hadamard's inequality	Theorem	Linear and multilinear algebra; matrix theory
Geometric quantization	Definition	Differential geometry
Elementary embedding	Concept	Mathematical logic and foundations
Completely positive map	Concept	Functional analysis
Hypergraph	Concept	Combinatorics
Brennan conjecture	Conjecture	Functions of a complex variable
Path homotopy	Definition	Algebraic topology
p-adic number	Definition	Field theory and polynomials
Line graph	Definition	Combinatorics
Mahlo cardinal	Concept	Mathematical logic and foundations
Courant–Fischer min-max theorem	Theorem	Linear and multilinear algebra; matrix theory
Hermitian manifold	Concept	Differential geometry
Space of functions of bounded variation	Definition	Real functions
q-analog	Definition	Combinatorics
Heyting arithmetic	Concept	Mathematical logic and foundations
Strict Henselization	Definition	Commutative algebra
Hyponormal operator	Definition	Operator theory
Loeb measure	Definition	Measure and integration
Woodin cardinal	Concept	Mathematical logic and foundations
Willmore flow	Definition	Differential geometry
Characteristic class	Definition	Algebraic topology
Turing degree	Definition	Mathematical logic and foundations
Hamilton–Jacobi–Bellman equation	Definition	Calculus of variations and optimal control; optimization
Lévy process	Definition	Probability theory and stochastic processes
Abstract Wiener space	Concept	Measure and integration
Invertible operator	Concept	Operator theory
Phase space	Concept	Ordinary differential equations
Gleason's theorem on projective compact spaces	Theorem	General topology
Combinatorial design	Definition	Combinatorics
Direct summand conjecture	Theorem	Commutative algebra
Projective module	Definition	Commutative algebra
Fuzzy measure	Concept	Measure and integration
Smoothness classes	Definition	Real functions
Modularity theorem	Theorem	Number theory
Prenex normal form	Concept	Mathematical logic and foundations
Deficiency indices	Definition	Operator theory
Detailed balance	Concept	Probability theory and stochastic processes
Cartan connection	Definition	Differential geometry
Natural density	Definition	Number theory
Free monoid	Concept	Group theory and generalizations
Arithmetical hierarchy	Definition	Mathematical logic and foundations
Random ordinary differential equation	Definition	Ordinary differential equations
Inverse spectral problem	Problem	Ordinary differential equations
Sigma-finite measure	Definition	Measure and integration
Double series	Definition	Sequences, series, summability
Model	Definition	Mathematical logic and foundations
Fiber bundle	Concept	Algebraic topology
Grothendieck's Galois theory	Concept	Field theory and polynomials
Non-vanishing of the zeta function on the line Re s = 1	Theorem	Number theory
Homoclinic orbit	Definition	Ordinary differential equations
Definable set	Concept	Mathematical logic and foundations
Transcendence basis	Definition	Field theory and polynomials
Pointless topology	Concept	Order, lattices, ordered algebraic structures
Pólya's theorem on integer-valued entire functions	Theorem	Functions of a complex variable
Hemicontinuity	Definition	General topology
Length of a module	Concept	Commutative algebra
Proof that a homomorphism is injective iff its kernel is trivial	Proof	Group theory and generalizations
Almost Mathieu operator	Example	Operator theory