Nodes at W0, stub

A tag, a kind, a name, an inventory row, and a same_as or a source.

Ideas 17251–17400 of 18145.

Name	Kind	Subject
Prefix code	Definition	Information and communication theory, circuits
Sierpiński's theorem on measurable midpoint convex functions	Theorem	Real functions
Approximation by convolution with mollifiers	Theorem	Functional analysis
Buchberger's algorithm	Definition	Commutative algebra
Evolute	Definition	Differential geometry
Star–triangle relation	Proposition	Statistical mechanics, structure of matter
Hessenberg matrix	Concept	Linear and multilinear algebra; matrix theory
Boundary layer	Concept	Ordinary differential equations
Integral transform	Concept	Integral transforms, operational calculus
Hilbert's twenty-third problem	Problem	Calculus of variations and optimal control; optimization
Homology with coefficients	Definition	Algebraic topology
Algebraic K-theory of spaces	Definition	K-theory
Abscissa of absolute convergence	Concept	Integral transforms, operational calculus
Autocorrelation function	Concept	Statistics
Kolmogorov four-fifths law	Theorem	Fluid mechanics
Revealed preference	Definition	Game theory, economics, finance, and other social and behavioral sciences
Kempe's universality theorem	Theorem	Mechanics of particles and systems
Homotopy groups of spheres	Concept	Algebraic topology
Dini derivative	Definition	Real functions
Adjoint state method	Concept	Calculus of variations and optimal control; optimization
Barnes G-function	Definition	Special functions
Artin–Schreier theorem on formally real fields	Theorem	Field theory and polynomials
S-matrix	Concept	Quantum theory
Goldman equation	Proposition	Biology and other natural sciences
Gillespie algorithm	Definition	Numerical analysis
Amitsur–Levitzki theorem	Theorem	Associative rings and algebras
Brjuno number	Definition	Dynamical systems and ergodic theory
Successive minima	Concept	Number theory
Error of best approximation	Concept	Approximations and expansions
Frequentist inference	Concept	Statistics
K0 of coherent sheaves	Concept	K-theory
Groundwater flow equation	Definition	Fluid mechanics
Distance measures in cosmology	Concept	Relativity and gravitational theory
Gabber rigidity theorem	Theorem	K-theory
Going-down theorem	Theorem	Commutative algebra
Mazur–Orlicz theorem	Theorem	Sequences, series, summability
Arnold's classification of simple singularities	Theorem	Several complex variables and analytic spaces
Stationary set	Concept	Mathematical logic and foundations
Chebyshev constant	Definition	Potential theory
Hill differential equation	Example	Ordinary differential equations
Bieberbach theorems	Theorem	Group theory and generalizations
Chain-ladder method	Definition	Game theory, economics, finance, and other social and behavioral sciences
Sturm separation theorem	Theorem	Ordinary differential equations
Richtmyer–Meshkov instability	Concept	Fluid mechanics
Random dynamical system	Definition	Dynamical systems and ergodic theory
Nagata's example of a Noetherian ring of infinite dimension	Counterexample	Commutative algebra
Earth tide	Definition	Geophysics
von Neumann bounded set	Definition	Functional analysis
Schläfli symbol	Definition	Geometry
Banzhaf power index	Concept	Game theory, economics, finance, and other social and behavioral sciences
HNN extension	Concept	Group theory and generalizations
Bond percolation	Definition	Statistical mechanics, structure of matter
Quasi-analytic function	Concept	Real functions
Unirational variety	Concept	Algebraic geometry
Robin constant	Definition	Potential theory
Limit set	Concept	Dynamical systems and ergodic theory
Weber number	Definition	Fluid mechanics
Excellent ring	Concept	Commutative algebra
Social welfare function	Definition	Game theory, economics, finance, and other social and behavioral sciences
Zero morphism	Concept	Category theory; homological algebra
Generalized cohomology theory	Definition	Algebraic topology
Isomorphism theorem for measure algebras	Theorem	Measure and integration
Hilbert's Theorem 90	Theorem	Field theory and polynomials
Order of a PDE	Definition	Partial differential equations
Unit hydrograph	Definition	Geophysics
Model of computation	Concept	Computer science
Helioseismology	Concept	Astronomy and astrophysics
Holomorphic functional calculus	Concept	Operator theory
Lifting-line theory	Concept	Fluid mechanics
Waveguide	Definition	Optics, electromagnetic theory
Malcev completion	Definition	Topological groups, Lie groups
Birkhoff–Frink representation of algebraic closure systems	Theorem	General algebraic systems
Jerk	Definition	Mechanics of particles and systems
Creep	Concept	Mechanics of deformable solids
(∞,1)-category	Concept	Category theory; homological algebra
Uniform boundedness principle	Theorem	Functional analysis
Gradient wind	Definition	Geophysics
Finite field arithmetic	Concept	Field theory and polynomials
Arrhenius equation	Fact	Classical thermodynamics, heat transfer
Dirichlet energy	Concept	Potential theory
Dissipative operator	Definition	Operator theory
Proper time	Concept	Relativity and gravitational theory
Choquet capacity	Definition	Measure and integration
Toomre's stability criterion	Theorem	Astronomy and astrophysics
Operator theory	Concept	Operator theory
Projective object	Definition	Category theory; homological algebra
Chebyshev–Markov–Stieltjes inequalities	Theorem	Integral transforms, operational calculus
Reciprocal gamma function	Definition	Special functions
Heat kernel	Definition	Partial differential equations
Period map	Concept	Several complex variables and analytic spaces
Bonferroni correction	Definition	Statistics
Quantum invariant of 3-manifolds	Concept	Manifolds and cell complexes
Olbers' paradox	Problem	Astronomy and astrophysics
Reflexive operator algebra	Definition	Operator theory
Gromov's compactness theorem	Theorem	Differential geometry
A Dedekind UFD is a PID	Proposition	Commutative algebra
Thermodynamic limit	Definition	Statistical mechanics, structure of matter
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
Automorphism group of a bounded domain is a Lie group	Theorem	Several complex variables and analytic spaces
Black hole	Concept	Relativity and gravitational theory
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
Reynolds number	Definition	Fluid mechanics
Lax–Wendroff method	Concept	Numerical analysis
Lie superalgebra	Definition	Nonassociative rings and algebras
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
Loop algebra	Concept	Nonassociative rings and algebras
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
Ruppeiner geometry	Concept	Classical thermodynamics, heat transfer
Commuting elements	Concept	General algebraic systems
3-j symbol	Concept	Special functions
Inverse Galois problem	Problem	Field theory and polynomials
Locally decodable code	Concept	Information and communication theory, circuits
Inhomogeneous electromagnetic wave equation	Definition	Optics, electromagnetic theory
Paris' law	Fact	Mechanics of deformable solids
Bellman–Ford algorithm	Definition	Combinatorics
Mirror symmetry	Concept	Algebraic geometry
Multitape Turing machine	Concept	Computer science
Ambiguity function	Definition	Information and communication theory, circuits
Discrete Dirichlet problem	Problem	Potential theory
International Geomagnetic Reference Field	Object	Geophysics
Kauffman bracket	Definition	Manifolds and cell complexes
Coleman–Mandula theorem	Theorem	Quantum theory
Theorema Egregium	Theorem	Differential geometry
Developable surface	Concept	Differential geometry
Effective temperature	Definition	Astronomy and astrophysics
Circle average	Definition	Potential theory
Likelihood-ratio test	Concept	Statistics
Hamilton's principal function	Concept	Mechanics of particles and systems
Perturbation theory in quantum mechanics	Definition	Quantum theory
Rellich–Kondrachov theorem	Theorem	Functional analysis