Every idea

Ideas 13651–13800 of 14167.

Name	Kind	Subject
Lax–Wendroff method	Concept	Numerical analysis
Fredholm integral equation	Definition	Integral equations
Lommel function	Concept	Special functions
Chandrasekhar's X- and Y-functions	Example	Integral equations
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
Discrete Dirichlet problem	Problem	Potential theory
Kauffman bracket	Definition	Manifolds and cell complexes
Theorema Egregium	Theorem	Differential geometry
Developable surface	Concept	Differential geometry
Circle average	Definition	Potential theory
Likelihood-ratio test	Concept	Statistics
Rellich–Kondrachov theorem	Theorem	Functional analysis
Multiplication theorem	Theorem	Special functions
Ordinary least squares	Concept	Statistics
Local asymptotic normality	Definition	Statistics
Oscillation of a function	Definition	Real functions
Bochner–Martinelli formula	Theorem	Several complex variables and analytic spaces
Site	Definition	Category theory; homological algebra
Bochner's tube theorem	Theorem	Several complex variables and analytic spaces
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
Affine arithmetic	Concept	Numerical analysis
Approximation theory	Concept	Approximations and expansions
Subfactor	Definition	Functional analysis
1 + 1 + 1 + 1 + ⋯	Example	Sequences, series, summability
Baker–Gammel–Wills conjecture	Conjecture	Approximations and expansions
Hurwitz zeta function	Definition	Number theory
Locally finite measure	Concept	Measure and integration
Finitely presented module	Definition	Commutative algebra
Commutant	Definition	Functional analysis
Functional inequality	Concept	Difference and functional equations
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
Nevanlinna parametrization of solutions	Theorem	Integral transforms, operational calculus
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
Nonlinear approximation	Concept	Approximations and expansions
Curse of dimensionality	Concept	Numerical analysis
Axiomatic potential theory	Concept	Potential theory
Nome	Concept	Special functions
Lambert summation	Definition	Sequences, series, summability
Fuchsian equation	Definition	Ordinary differential equations
Compact quantum group	Definition	Functional analysis
Zeta-regularized determinant	Concept	Global analysis, analysis on manifolds
Product order	Definition	Order, lattices, ordered algebraic structures
Nevanlinna characteristic	Concept	Functions of a complex variable
Expansion in spherical harmonics	Theorem	Potential theory
Time-optimal control	Problem	Calculus of variations and optimal control; optimization
Classifying topos	Definition	Category theory; homological algebra
Mellin transform of a dilation	Proposition	Integral transforms, operational calculus
Quasi-everywhere	Definition	Potential theory
Vaught conjecture	Conjecture	Mathematical logic and foundations
Clenshaw–Curtis quadrature	Definition	Numerical analysis
Mersenne Twister	Object	Numerical analysis
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
Chebyshev nodes	Definition	Numerical analysis
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
Regularity of minimizers	Definition	Calculus of variations and optimal control; optimization
Limiting subdifferential	Definition	Calculus of variations and optimal control; optimization
Riesz potential operator	Definition	Operator theory
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
Analysis on fractals	Concept	Potential theory
Fractional differential equation	Concept	Ordinary differential equations
Local truncation error	Definition	Numerical analysis
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
Morse index theorem for geodesics	Theorem	Global analysis, analysis on manifolds
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
Periodicity equation	Concept	Difference and functional equations
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
Sard–Smale theorem	Theorem	Global analysis, analysis on manifolds
Chern–Simons form	Definition	Differential geometry
Supermanifold	Concept	Global analysis, analysis on manifolds