Every idea

Ideas 11551–11700 of 11985.

Name	Kind	Subject
Finite field arithmetic	Concept	Field theory and polynomials
Dissipative operator	Definition	Operator theory
Choquet capacity	Definition	Measure and integration
Operator theory	Concept	Operator theory
Projective object	Definition	Category theory; homological algebra
Reciprocal gamma function	Definition	Special functions
Heat kernel	Definition	Partial differential equations
Bonferroni correction	Definition	Statistics
Quantum invariant of 3-manifolds	Concept	Manifolds and cell complexes
Reflexive operator algebra	Definition	Operator theory
Gromov's compactness theorem	Theorem	Differential geometry
A Dedekind UFD is a PID	Proposition	Commutative algebra
Finitely based algebra	Concept	General algebraic systems
Triangulation	Concept	Manifolds and cell complexes
Scaling function and refinement equation	Concept	Harmonic analysis on Euclidean spaces
Synthetic geometry	Definition	Geometry
Semilocal ring	Definition	Associative rings and algebras
One-parameter subgroup	Concept	Topological groups, Lie groups
Hilbert's axioms	Definition	Geometry
Langlands classification	Theorem	Topological groups, Lie groups
Poincaré–Lindstedt method	Concept	Ordinary differential equations
Eilenberg–Steenrod axioms	Concept	Algebraic topology
Perspective projection	Concept	Geometry
Doob decomposition theorem	Theorem	Probability theory and stochastic processes
Lommel function	Concept	Special functions
Symmetric decreasing rearrangement	Definition	Real functions
Sphere packing in dimensions 8 and 24	Theorem	Convex and discrete geometry
Combinatorics on words	Concept	Computer science
WKB approximation	Concept	Ordinary differential equations
Trigonometric moment problem	Problem	Harmonic analysis on Euclidean spaces
Ramification group	Definition	Number theory
Analytic combinatorics	Concept	Combinatorics
Wedderburn's theorem on simple Artinian rings	Theorem	Associative rings and algebras
Ruled surface	Definition	Algebraic geometry
Commuting elements	Concept	General algebraic systems
3-j symbol	Concept	Special functions
Inverse Galois problem	Problem	Field theory and polynomials
Mirror symmetry	Concept	Algebraic geometry
Ambiguity function	Definition	Information and communication theory, circuits
Kauffman bracket	Definition	Manifolds and cell complexes
Theorema Egregium	Theorem	Differential geometry
Developable surface	Concept	Differential geometry
Likelihood-ratio test	Concept	Statistics
Rellich–Kondrachov theorem	Theorem	Functional analysis
Ordinary least squares	Concept	Statistics
Local asymptotic normality	Definition	Statistics
Oscillation of a function	Definition	Real functions
Site	Definition	Category theory; homological algebra
Bredon cohomology	Concept	Algebraic topology
Frequentist inference	Definition	Statistics
Incidence matrix	Definition	Combinatorics
Harnack's inequality	Theorem	Potential theory
Gumm terms	Definition	General algebraic systems
Synchronization of chaos	Concept	Ordinary differential equations
Nonassociative ring	Concept	Nonassociative rings and algebras
Chevalley group	Concept	Group theory and generalizations
Integer factorization	Problem	Number theory
Subfactor	Definition	Functional analysis
1 + 1 + 1 + 1 + ⋯	Example	Sequences, series, summability
Hurwitz zeta function	Definition	Number theory
Locally finite measure	Concept	Measure and integration
Finitely presented module	Definition	Commutative algebra
Commutant	Definition	Functional analysis
Artinian module	Concept	Associative rings and algebras
Hahn series	Concept	Commutative algebra
Bessel polynomials	Definition	Special functions
Observability	Definition	Systems theory; control
Diagonally dominant matrix	Definition	Linear and multilinear algebra; matrix theory
Free boundary problem	Problem	Partial differential equations
Controllability	Definition	Systems theory; control
Likelihood principle	Axiom	Statistics
Model complete theory	Concept	Mathematical logic and foundations
Functional differential equation	Definition	Ordinary differential equations
Koszul algebra	Definition	Associative rings and algebras
Kolmogorov automorphism	Concept	Dynamical systems and ergodic theory
Integro-differential equation	Concept	Integral equations
Adapted process	Concept	Probability theory and stochastic processes
Order of an entire function	Definition	Functions of a complex variable
Convex body	Definition	Convex and discrete geometry
Tarski's undefinability theorem	Theorem	Mathematical logic and foundations
Three-term recurrence for orthogonal polynomials	Theorem	Harmonic analysis on Euclidean spaces
Gaussian binomial coefficient	Concept	Combinatorics
Nome	Concept	Special functions
Lambert summation	Definition	Sequences, series, summability
Fuchsian equation	Definition	Ordinary differential equations
Compact quantum group	Definition	Functional analysis
Product order	Definition	Order, lattices, ordered algebraic structures
Nevanlinna characteristic	Concept	Functions of a complex variable
Classifying topos	Definition	Category theory; homological algebra
Vaught conjecture	Conjecture	Mathematical logic and foundations
Continuous and residual spectrum	Concept	Operator theory
Simplicial polytope	Concept	Convex and discrete geometry
Surreal number	Object	Order, lattices, ordered algebraic structures
Valuation ring	Definition	Commutative algebra
d'Alembert's formula	Theorem	Partial differential equations
Topology of uniform convergence	Concept	General topology
Jacobi field	Definition	Differential geometry
Deformation retract	Definition	General topology
Club set	Concept	Mathematical logic and foundations
Toric variety	Concept	Algebraic geometry
Instanton	Concept	Differential geometry
Isomorphism	Definition	General algebraic systems
Oriented matroid	Definition	Convex and discrete geometry
Weierstrass–Enneper parameterization	Theorem	Differential geometry
Uniform space	Definition	General topology
Trace form	Concept	Field theory and polynomials
Smn theorem	Theorem	Mathematical logic and foundations
Rate of convergence	Concept	Sequences, series, summability
Koszul duality	Definition	Associative rings and algebras
Simplex	Concept	Geometry
Loewner differential equation	Definition	Functions of a complex variable
Exceptional Lie group G2	Example	Topological groups, Lie groups
Hadwiger–Nelson problem	Problem	Combinatorics
Uniform module	Concept	Associative rings and algebras
Group cohomology	Concept	Group theory and generalizations
Projective object	Concept	Category theory; homological algebra
Inversion in a circle	Concept	Geometry
Arakelov theory	Concept	Algebraic geometry
Classification of covering spaces	Theorem	Manifolds and cell complexes
Fractional differential equation	Concept	Ordinary differential equations
Gelfand–Kirillov dimension	Definition	Associative rings and algebras
Bunimovich stadium	Example	Dynamical systems and ergodic theory
Kirby–Siebenmann class	Definition	Manifolds and cell complexes
J-homomorphism	Concept	Algebraic topology
Measurable function	Concept	Measure and integration
Connes embedding problem	Problem	Functional analysis
Laplace's integral for Legendre polynomials	Theorem	Special functions
Manifold with boundary	Definition	Manifolds and cell complexes
Lying over theorem	Theorem	Commutative algebra
Measure algebra	Concept	Measure and integration
Symmetric algebra	Definition	Linear and multilinear algebra; matrix theory
Pochhammer symbol	Concept	Combinatorics
Calabi–Yau manifold	Definition	Algebraic geometry
Field of formal Laurent series	Concept	Commutative algebra
Arity	Definition	General algebraic systems
Slice category	Definition	Category theory; homological algebra
Koszul complex	Concept	Commutative algebra
Kolmogorov–Smirnov test	Concept	Statistics
Schubert variety	Concept	Algebraic geometry
Semicontinuity	Definition	General topology
Chern–Simons form	Definition	Differential geometry
Line segment	Definition	Convex and discrete geometry
Uniserial module	Concept	Associative rings and algebras
Order filter	Concept	Order, lattices, ordered algebraic structures
Duality in category theory	Definition	Category theory; homological algebra
Racah polynomials	Definition	Special functions
Cotangent space of a local ring	Concept	Commutative algebra
Difference algebra	Concept	Field theory and polynomials
Abel summation	Definition	Sequences, series, summability
Subharmonic function	Concept	Potential theory