Every idea

Ideas 22201–22263 of 22263.

Name	Kind	Subject
Weak Nullstellensatz	Theorem	Commutative algebra
Newton–Puiseux theorem	Theorem	Commutative algebra
Péclet number	Definition	Fluid mechanics
Maxwell stress tensor	Concept	Optics, electromagnetic theory
Quaternion algebra	Concept	Associative rings and algebras
Pareto efficiency	Definition	Game theory, economics, finance, and other social and behavioral sciences
Dynamic similarity	Concept	Fluid mechanics
A priori estimate	Definition	Partial differential equations
Proof of the Cauchy–Schwarz inequality for expectations	Proof	Probability theory and stochastic processes
Cutting-plane method	Definition	Operations research, mathematical programming
f(R) gravity	Concept	Relativity and gravitational theory
Proof of the cancellation laws	Proof	Group theory and generalizations
Completion of a measure	Definition	Measure and integration
Hellinger–Toeplitz theorem	Theorem	Operator theory
Disjoint union topology	Concept	General topology
Absolute continuity of the Lebesgue integral	Proposition	Measure and integration
Theil index	Concept	Game theory, economics, finance, and other social and behavioral sciences
Biot–Savart law for vortex filaments	Proposition	Fluid mechanics
Lattice gauge theory	Definition	Quantum theory
Reduced scheme	Concept	Algebraic geometry
Divisible group	Concept	Group theory and generalizations
Maupertuis's principle	Theorem	Mechanics of particles and systems
Transitivity of integrality	Proposition	Commutative algebra
Bäcklund transform	Definition	Dynamical systems and ergodic theory
Khachiyan's theorem that linear programming is in P	Theorem	Operations research, mathematical programming
Riemann solver	Concept	Numerical analysis
Euler–Lagrange equation	Definition	Calculus of variations and optimal control; optimization
Category of small categories	Example	Category theory; homological algebra
Fundamental solution	Definition	Partial differential equations
Whitehead tower	Definition	Algebraic topology
Littelmann path model	Definition	Nonassociative rings and algebras
Boundary integral equation for the Dirichlet problem	Theorem	Potential theory
Riesz basis	Concept	Harmonic analysis on Euclidean spaces
Divide-and-conquer algorithm	Definition	Computer science
Levitzki radical	Definition	Associative rings and algebras
Biot number	Concept	Classical thermodynamics, heat transfer
Discrete valuation	Definition	Field theory and polynomials
Invariant mean	Concept	Abstract harmonic analysis
Height of a poset	Definition	Order, lattices, ordered algebraic structures
Degree of exactness of a quadrature rule	Concept	Numerical analysis
Iwasawa decomposition	Theorem	Nonassociative rings and algebras
Thom–Boardman singularities	Definition	Manifolds and cell complexes
Pariah groups	Concept	Group theory and generalizations
hp-FEM	Concept	Numerical analysis
Radial distribution function	Definition	Statistical mechanics, structure of matter
Branch and bound	Concept	Operations research, mathematical programming
Elliptic gamma function	Definition	Special functions
Spence signaling model	Definition	Game theory, economics, finance, and other social and behavioral sciences
Chapman–Jouguet condition	Proposition	Fluid mechanics
Lane–Emden equation	Definition	Partial differential equations
Residue calculus for Laplace inversion	Definition	Integral transforms, operational calculus
Free magma	Example	General algebraic systems
Orderable group	Definition	Group theory and generalizations
Inverse mean curvature flow	Definition	Differential geometry
Teichmüller space	Concept	Functions of a complex variable
Higher-order vagueness	Concept
Bramble (graph theory)	Concept
Continuous multiplication	Concept	Topological groups, Lie groups
Étale cohomology	Definition	Algebraic geometry
Stein–Tomas restriction theorem	Theorem	Harmonic analysis on Euclidean spaces
Obstruction theory	Concept	Algebraic topology
Critical path method	Definition	Operations research, mathematical programming
Heisenberg group	Example	Topological groups, Lie groups