Every idea

Ideas 14401–14550 of 19838.

Name	Kind	Subject
Zero morphism	Definition	Category theory; homological algebra
Weil's quotient integral formula	Theorem	Measure and integration
Inaccessible cardinal	Concept	Mathematical logic and foundations
Pure weights	Concept	Number theory
Monge point	Concept	Geometry
Rational point	Definition	Algebraic geometry
Γ-convergence	Concept	Calculus of variations and optimal control; optimization
Frobenius element	Definition	Number theory
Klee–Minty cube	Counterexample	Operations research, mathematical programming
Enumerative combinatorics	Definition	Combinatorics
Browder–Minty theorem	Theorem	Operator theory
Holonomic sequence	Concept	Difference and functional equations
Montel space	Concept	Functional analysis
Lemniscate elliptic functions	Definition	Special functions
Osculating circle	Concept	Differential geometry
Enthalpy method for phase change	Definition	Classical thermodynamics, heat transfer
Lefschetz duality	Theorem	Algebraic topology
Poisson's ratio	Concept	Mechanics of deformable solids
Almost complex manifold	Definition	Differential geometry
Morrey–Campanato space	Concept	Functional analysis
Winner's curse	Definition	Game theory, economics, finance, and other social and behavioral sciences
Thin set	Definition	Potential theory
Groupoid	Definition	Group theory and generalizations
Grothendieck inequality	Theorem	Functional analysis
Total variation diminishing scheme	Concept	Numerical analysis
Fermi–Walker transport	Concept	Relativity and gravitational theory
Universal class	Definition	Mathematical logic and foundations
Lieb's square ice constant	Theorem	Statistical mechanics, structure of matter
Caristi fixed-point theorem	Theorem	Operator theory
Oka manifold	Concept	Several complex variables and analytic spaces
Carathéodory metric	Definition	Several complex variables and analytic spaces
Multi-compartment model in pharmacokinetics	Definition	Biology and other natural sciences
Quillen Q-construction	Definition	K-theory
Generating function of a canonical transformation	Concept	Mechanics of particles and systems
Elliptic integral	Concept	Special functions
Channel polarization theorem	Theorem	Information and communication theory, circuits
Schmidt decomposition	Theorem	Quantum theory
Fourier basis of L2 of the circle	Theorem	Harmonic analysis on Euclidean spaces
Gaussian measure	Definition	Measure and integration
Brody hyperbolicity	Definition	Several complex variables and analytic spaces
Real spectrum of self-adjoint operators	Theorem	Operator theory
Kelvin transform	Definition	Potential theory
JB-algebra	Concept	Functional analysis
Dolbeault operator	Definition	Several complex variables and analytic spaces
Semisimple ring	Concept	Associative rings and algebras
Projective hierarchy	Definition	Mathematical logic and foundations
Chebyshev system	Concept	Approximations and expansions
Closed operator	Definition	Operator theory
Complex measure	Concept	Measure and integration
Kodaira vanishing theorem	Theorem	Algebraic geometry
Lambert's problem	Problem	Mechanics of particles and systems
Non-uniform discrete Fourier transform	Concept	Numerical analysis
Periodic solution of a difference equation	Definition	Difference and functional equations
Hyperbolic set	Definition	Dynamical systems and ergodic theory
Site	Concept	Category theory; homological algebra
de Branges space	Concept	Functional analysis
Context-sensitive language	Concept	Computer science
Adele ring	Definition	Number theory
Post's theorem	Theorem	Mathematical logic and foundations
Recurrence and capacity of graphs	Theorem	Potential theory
Kolmogorov microscales	Concept	Fluid mechanics
Lee–Yang theorem	Theorem	Statistical mechanics, structure of matter
Coulomb wave function	Definition	Special functions
Krein–Smulian theorem	Theorem	Functional analysis
Relatively free algebra	Concept	General algebraic systems
Nil ideal	Concept	Associative rings and algebras
Drag coefficient	Concept	Fluid mechanics
Hyperfinite type II1 factor	Object	Functional analysis
Friedrichs extension	Definition	Operator theory
Flux limiter	Concept	Numerical analysis
Versal unfolding	Definition	Global analysis, analysis on manifolds
Sontag's universal formula	Theorem	Systems theory; control
Synchronization of chaos	Definition	Ordinary differential equations
Parametric oscillator	Definition	Mechanics of particles and systems
Matrix congruence	Definition	Linear and multilinear algebra; matrix theory
Kármán vortex street	Example	Fluid mechanics
Universal code	Concept	Information and communication theory, circuits
Symmetric cone	Concept	Nonassociative rings and algebras
Symplectic integrator	Definition	Numerical analysis
Coupling from the past	Concept	Numerical analysis
Unique ergodicity	Concept	Dynamical systems and ergodic theory
Abelian differential	Concept	Functions of a complex variable
Pure and mixed strategy	Concept	Game theory, economics, finance, and other social and behavioral sciences
Jacobi elliptic functions	Concept	Special functions
P/poly	Definition	Computer science
P/poly	Concept	Computer science
Abraham–Minkowski controversy	Problem	Optics, electromagnetic theory
Gaussian measure	Concept	Measure and integration
Computational electromagnetics	Concept	Partial differential equations
Absolutely continuous measure	Concept	Measure and integration
Schwarz reflection principle	Theorem	Functions of a complex variable
Coalgebra	Definition	Associative rings and algebras
Indirect method by shooting	Definition	Calculus of variations and optimal control; optimization
Hölder space	Concept	Functional analysis
Einstein tensor	Concept	Relativity and gravitational theory
Generalized least squares	Concept	Statistics
Harnack's principle	Theorem	Potential theory
Measure space	Concept	Measure and integration
Character table	Concept	Group theory and generalizations
Hulanicki's theorem	Theorem	Abstract harmonic analysis
Higher-order logic	Concept	Mathematical logic and foundations
SIS and SEIR models	Concept	Biology and other natural sciences
LOBPCG	Proposition	Numerical analysis
Bicubic interpolation	Concept	Numerical analysis
Lubrication theory	Definition	Fluid mechanics
Maurer–Cartan form	Concept	Topological groups, Lie groups
General equilibrium theory	Definition	Game theory, economics, finance, and other social and behavioral sciences
Strain rate tensor	Concept	Fluid mechanics
Projective transformation	Concept	Geometry
sl2 triple	Concept	Nonassociative rings and algebras
Hilbert's program	Problem	Mathematical logic and foundations
Sinc function	Concept	Special functions
G2 manifold	Concept	Differential geometry
Fractional integration	Concept	Harmonic analysis on Euclidean spaces
Harmonic functions on Riemann surfaces	Concept	Functions of a complex variable
Laminar–turbulent transition	Definition	Fluid mechanics
Admissibility condition for wavelets	Definition	Harmonic analysis on Euclidean spaces
Poiseuille flow	Example	Fluid mechanics
Additive combinatorics	Definition	Number theory
Linearly ordered group	Concept	Order, lattices, ordered algebraic structures
Nerve of a cover	Definition	Algebraic topology
Kingman's coalescent	Concept	Probability theory and stochastic processes
Splitting field of a central simple algebra	Definition	Associative rings and algebras
Operator monotone function	Definition	Operator theory
Propagation of singularities	Theorem	Partial differential equations
Stabilizer code	Concept	Quantum theory
Feit–Higman theorem	Theorem	Geometry
Binet equation	Definition	Mechanics of particles and systems
Baire space of sequences	Object	General topology
Pseudo algebraically closed field	Definition	Field theory and polynomials
Strict total order	Concept	Order, lattices, ordered algebraic structures
Hill sphere	Concept	Mechanics of particles and systems
Matsubara frequency	Concept	Quantum theory
Least squares approximation	Definition	Approximations and expansions
Resolvent kernel	Definition	Integral equations
Elementary equivalence	Concept	Mathematical logic and foundations
Envy-freeness	Concept	Game theory, economics, finance, and other social and behavioral sciences
Discrete wavelet transform	Concept	Harmonic analysis on Euclidean spaces
(p,q)-form	Definition	Several complex variables and analytic spaces
Poynting vector	Concept	Optics, electromagnetic theory
Moments of the log-normal distribution	Counterexample	Integral transforms, operational calculus
Band-limited function	Concept	Information and communication theory, circuits
Strict hyperbolicity	Concept	Partial differential equations
Autoregressive conditional heteroskedasticity	Definition	Statistics
Lie's theorems on transformation groups	Theorem	Topological groups, Lie groups
BSSN formalism	Concept	Relativity and gravitational theory
Spherical mean transform	Concept	Integral transforms, operational calculus
Empirical risk minimization	Definition	Computer science
Vector bundle	Concept	Algebraic geometry
Hankel operator	Concept	Operator theory