Every idea

Ideas 15601–15750 of 19875.

Name	Kind	Subject
Space hierarchy theorem	Theorem	Computer science
Process calculus	Definition	Computer science
Hilbert's syzygy theorem	Theorem	Commutative algebra
Pincherle derivative	Concept	Operator theory
Ising model	Example	Statistical mechanics, structure of matter
Reed–Frost model	Definition	Biology and other natural sciences
Kuranishi family	Concept	Several complex variables and analytic spaces
Jones calculus	Definition	Optics, electromagnetic theory
Smooth morphism	Definition	Algebraic geometry
Perron–Wiener–Brelot solution	Concept	Potential theory
Reduced scheme	Definition	Algebraic geometry
Representation theory of the Lorentz group	Example	Topological groups, Lie groups
Derivation	Definition	Commutative algebra
Artin–Wedderburn theorem	Theorem	Associative rings and algebras
Urysohn universal space	Object	General topology
Elastic pendulum	Example	Mechanics of particles and systems
Newton's method in optimization	Definition	Operations research, mathematical programming
Marcinkiewicz interpolation theorem	Theorem	Functional analysis
Filtered algebra	Concept	Associative rings and algebras
Rejection sampling	Theorem	Numerical analysis
Simplicial homology	Definition	Algebraic topology
Intersection body	Definition	Convex and discrete geometry
Hall basis	Concept	Nonassociative rings and algebras
Poincaré problem	Problem	Several complex variables and analytic spaces
Lambert W function	Definition	Special functions
Flexible algebra	Concept	Nonassociative rings and algebras
Internal energy	Definition	Classical thermodynamics, heat transfer
3-manifold	Concept	Manifolds and cell complexes
Prevariety	Definition	General algebraic systems
Quantum teleportation	Concept	Quantum theory
Bernstein–Sato polynomial	Definition	Algebraic geometry
Principal component analysis	Definition	Statistics
Elasticity tensor	Definition	Mechanics of deformable solids
Natural convection	Concept	Fluid mechanics
Volterra equations with completely monotone kernels	Definition	Integral equations
Brauer character	Concept	Group theory and generalizations
Picard's little theorem	Theorem	Functions of a complex variable
Birthday attack	Proposition	Information and communication theory, circuits
Froude number	Concept	Fluid mechanics
Smooth structure	Concept	Manifolds and cell complexes
Liouville's theorems on elliptic functions	Theorem	Special functions
Lie ideal	Definition	Nonassociative rings and algebras
Galois connection between subgroups and subfields	Concept	Field theory and polynomials
Randić index	Concept	Combinatorics
Coiflet	Example	Harmonic analysis on Euclidean spaces
Dedekind zeta function	Definition	Number theory
Fréchet–Urysohn space	Concept	General topology
Hamiltonian optics	Definition	Optics, electromagnetic theory
Dynamic programming	Concept	Operations research, mathematical programming
Power series in several variables	Concept	Several complex variables and analytic spaces
Integral equation	Concept	Integral equations
Semilocally simply connected space	Concept	Manifolds and cell complexes
Projective conic	Concept	Geometry
Tipping points in the climate system	Concept	Geophysics
Ogden's lemma	Lemma	Computer science
Hurwitz-stable matrix	Definition	Linear and multilinear algebra; matrix theory
Numerical relativity	Definition	Relativity and gravitational theory
Transport equation	Definition	Partial differential equations
Aitken's delta-squared process	Definition	Numerical analysis
Bruck–Ryser–Chowla theorem	Theorem	Combinatorics
Sturm's theorem	Theorem	Field theory and polynomials
Kummer–Artin–Schreier–Witt theory	Concept	Field theory and polynomials
Torus integral	Concept	Several complex variables and analytic spaces
Projective resolution	Definition	Commutative algebra
Neumann's addition theorem	Theorem	Special functions
Gelfand–Levitan theory	Concept	Ordinary differential equations
Incomplete gamma function	Definition	Special functions
Multidimensional scaling	Definition	Statistics
Cauchy–Riemann operator	Definition	Several complex variables and analytic spaces
Hadamard finite part	Definition	Integral equations
Normal scheme	Definition	Algebraic geometry
Permanent	Definition	Linear and multilinear algebra; matrix theory
Euler's pentagonal number theorem	Theorem	Number theory
Oriented matroid	Concept	Convex and discrete geometry
No free lunch theorem for optimization	Theorem	Operations research, mathematical programming
Bose–Einstein statistics	Concept	Statistical mechanics, structure of matter
Stochastic ordering	Definition	Probability theory and stochastic processes
Dispersion relation	Concept	Optics, electromagnetic theory
Contractible space	Concept	Algebraic topology
Ramsey–Cass–Koopmans model	Definition	Game theory, economics, finance, and other social and behavioral sciences
Hecke character	Concept	Number theory
The natural numbers under addition are not a group	Example	Group theory and generalizations
Dual pair	Concept	Functional analysis
n-skeleton	Definition	Manifolds and cell complexes
Tetrahedron	Definition	Geometry
Fixed point	Concept	Dynamical systems and ergodic theory
Unimodular matrix	Concept	Linear and multilinear algebra; matrix theory
Convective heat transfer	Definition	Classical thermodynamics, heat transfer
N-body simulation	Definition	Astronomy and astrophysics
Phase diagram	Concept	Classical thermodynamics, heat transfer
Entropy power inequality	Theorem	Information and communication theory, circuits
Seeley–DeWitt coefficients	Concept	Global analysis, analysis on manifolds
Clifford–Klein form	Concept	Manifolds and cell complexes
String-searching algorithm	Definition	Computer science
Initial algebra	Concept	Category theory; homological algebra
Ruzsa triangle inequality	Theorem	Number theory
Borel subgroup	Definition	Group theory and generalizations
Localization of a space	Definition	Algebraic topology
Selfridge–Conway procedure	Definition	Game theory, economics, finance, and other social and behavioral sciences
Bending of plates	Concept	Mechanics of deformable solids
Unital magma	Definition	Group theory and generalizations
Kernel approximation in reproducing kernel Hilbert spaces	Concept	Functional analysis
Ordered semigroup	Definition	Order, lattices, ordered algebraic structures
Vertex of a polytope	Concept	Convex and discrete geometry
Cartan's theorem B	Theorem	Several complex variables and analytic spaces
Abelian variety	Concept	Algebraic geometry
Willmore energy	Concept	Differential geometry
Convex hull algorithms	Concept	Computer science
Liouvillian function	Definition	Field theory and polynomials
Cylinder set measure	Definition	Measure and integration
Self-similar measure	Concept	Measure and integration
Apparent magnitude	Concept	Astronomy and astrophysics
Hilbert manifold	Concept	Global analysis, analysis on manifolds
Bass–Heller–Swan theorem	Theorem	K-theory
Synchrotron radiation	Definition	Astronomy and astrophysics
Complex analytic space	Definition	Several complex variables and analytic spaces
Hasse–Minkowski theorem	Theorem	Number theory
Fourier–Stieltjes algebra	Concept	Abstract harmonic analysis
Cauchy surface	Concept	Differential geometry
Frobenius theorem on Cesàro and Abel summability	Theorem	Sequences, series, summability
Likelihood-ratio test	Definition	Statistics
Linking number	Definition	Manifolds and cell complexes
Cardinal characteristics of the continuum	Definition	Mathematical logic and foundations
Floating-point arithmetic	Definition	Numerical analysis
Zolotarev polynomials	Concept	Approximations and expansions
Weierstrass excess function	Concept	Calculus of variations and optimal control; optimization
Calderón problem	Problem	Partial differential equations
Univalent function	Concept	Functions of a complex variable
Schur complement method	Proposition	Numerical analysis
Cauchy–Fantappiè formula	Theorem	Several complex variables and analytic spaces
Thue–Siegel–Roth theorem	Theorem	Number theory
Vickrey–Clarke–Groves mechanism	Definition	Game theory, economics, finance, and other social and behavioral sciences
Water waves	Concept	Fluid mechanics
Virasoro algebra	Object	Nonassociative rings and algebras
Reference ellipsoid	Concept	Geophysics
Isometry of Riemannian manifolds	Concept	Differential geometry
Friedberg–Muchnik theorem	Theorem	Mathematical logic and foundations
One-way function	Concept	Information and communication theory, circuits
NTU method	Definition	Classical thermodynamics, heat transfer
Biot–Savart law	Fact	Optics, electromagnetic theory
Topological monoid	Concept	Topological groups, Lie groups
Width of a poset	Concept	Order, lattices, ordered algebraic structures
Toeplitz index theorem	Theorem	Operator theory
Alphabet	Concept	Computer science
Boundary layer separation	Definition	Fluid mechanics
Weyl's inequality	Theorem	Linear and multilinear algebra; matrix theory
Hamiltonian of an optimal control problem	Concept	Calculus of variations and optimal control; optimization
Minimal sufficient statistic	Concept	Statistics
No-hair theorem	Theorem	Relativity and gravitational theory
Monad in nonstandard topology	Concept	General topology