Every idea

Ideas 13951–14100 of 14167.

Name	Kind	Subject
Mathieu function	Definition	Special functions
Amenable group action	Concept	Abstract harmonic analysis
Varifold	Definition	Calculus of variations and optimal control; optimization
Minimum-variance unbiased estimator	Concept	Statistics
Lagrange basis polynomials	Definition	Approximations and expansions
Immersion	Definition	Manifolds and cell complexes
Concrete category of algebras	Concept	General algebraic systems
Primary decomposition	Concept	Commutative algebra
Birational map	Definition	Algebraic geometry
Barratt–Priddy–Quillen theorem	Theorem	Algebraic topology
Sklar's theorem	Theorem	Statistics
Blocking set	Concept	Geometry
Ehrhart–Macdonald reciprocity	Theorem	Convex and discrete geometry
Bareiss algorithm	Theorem	Numerical analysis
Semilocal ring	Concept	Associative rings and algebras
Manifold of smooth mappings	Definition	Global analysis, analysis on manifolds
Harmonic majorant	Concept	Potential theory
Permutation group	Concept	Group theory and generalizations
Continuous lattice	Definition	Order, lattices, ordered algebraic structures
Integral equation of the first kind	Concept	Integral equations
Colombeau algebra	Definition	Functional analysis
Potential of a measure	Definition	Potential theory
Tikhonov regularization	Definition	Operator theory
Hartley transform	Definition	Integral transforms, operational calculus
Barrelled space	Concept	Functional analysis
Anti-equivalence of affine schemes and rings	Theorem	Algebraic geometry
Fundamental class	Concept	Manifolds and cell complexes
Join	Concept	General topology
Support of a measure	Definition	Measure and integration
Method of images	Definition	Potential theory
Hartogs lemma for subharmonic functions	Lemma	Potential theory
Many-sorted algebra	Definition	General algebraic systems
Irreducible matrix	Definition	Linear and multilinear algebra; matrix theory
Variogram	Concept	Statistics
Dirac operator	Definition	Global analysis, analysis on manifolds
Δ-complex	Concept	Algebraic topology
Fundamental groupoid	Definition	Algebraic topology
Kirby calculus	Definition	Manifolds and cell complexes
Lyapunov equation	Definition	Linear and multilinear algebra; matrix theory
Functor category	Definition	Category theory; homological algebra
Black–Scholes equation	Concept	Partial differential equations
Normed field	Concept	Field theory and polynomials
Quasi-isometry	Definition	Group theory and generalizations
Priestley space	Concept	Order, lattices, ordered algebraic structures
Flexible polyhedron	Example	Convex and discrete geometry
Faber polynomials	Definition	Functions of a complex variable
Orlicz space	Definition	Functional analysis
Parallelizable manifold	Definition	Manifolds and cell complexes
Markov chain Monte Carlo	Concept	Numerical analysis
Complementary error function	Definition	Special functions
Deligne–Lusztig theory	Concept	Group theory and generalizations
Paracompact space	Definition	General topology
Oscillation theory	Concept	Ordinary differential equations
Graceful tree conjecture	Conjecture	Combinatorics
Green's function	Definition	Ordinary differential equations
Smooth morphism of rings	Definition	Commutative algebra
Relative homotopy group	Concept	Algebraic topology
Pesin theory	Concept	Dynamical systems and ergodic theory
Join-irreducible element	Concept	Order, lattices, ordered algebraic structures
Scalar curvature	Concept	Differential geometry
Domain of finite type	Concept	Several complex variables and analytic spaces
Weighted polynomial approximation	Definition	Approximations and expansions
C0-semigroup	Definition	Operator theory
Banach–Mazur distance	Concept	Functional analysis
Cone theorem	Theorem	Algebraic geometry
Adams' theorem on Hopf invariant one	Theorem	Algebraic topology
Generalized Boolean algebra	Concept	Order, lattices, ordered algebraic structures
Laplace transform of a periodic function	Example	Integral transforms, operational calculus
Levi pseudoconvex domain	Definition	Several complex variables and analytic spaces
Holomorphy of the gamma function	Theorem	Special functions
Enflo's counterexample to the approximation problem	Counterexample	Functional analysis
Sheaf of differentials	Definition	Algebraic geometry
Cascade algorithm	Definition	Numerical analysis
Continuous kernel	Concept	Integral equations
Mellin transform under inversion of the variable	Proposition	Integral transforms, operational calculus
Frenet–Serret formulas	Theorem	Differential geometry
Hilbert–Schmidt integral operator	Definition	Operator theory
Functional differential equation	Concept	Ordinary differential equations
Chevalley group	Definition	Group theory and generalizations
Banach–Zarecki theorem	Theorem	Real functions
Griess algebra	Object	Group theory and generalizations
Bieberbach conjecture	Theorem	Functions of a complex variable
Runge's phenomenon	Example	Approximations and expansions
Nest algebra	Concept	Operator theory
Zonoid	Concept	Convex and discrete geometry
Discrete Laplace operator	Concept	Difference and functional equations
Ramanujan's master theorem	Theorem	Integral transforms, operational calculus
Doob's h-transform	Concept	Probability theory and stochastic processes
Kontorovich–Lebedev transform	Definition	Integral transforms, operational calculus
Grauert's direct image theorem	Theorem	Several complex variables and analytic spaces
Hilbert transform of sinusoids	Example	Integral transforms, operational calculus
Fourier transform of the Gaussian	Proposition	Harmonic analysis on Euclidean spaces
Finite-dimensional Hausdorff vector topologies are Euclidean	Theorem	Functional analysis
Hofstadter sequences	Example	Number theory
Radical of an ideal	Definition	Commutative algebra
Sample mean and sample covariance	Concept	Statistics
Volume conjecture	Conjecture	Manifolds and cell complexes
Uniform algebra	Concept	Functional analysis
Carathéodory's royal road	Definition	Calculus of variations and optimal control; optimization
Stochastic approximation	Concept	Statistics
Control system	Concept	Systems theory; control
Observed information	Definition	Statistics
Generalized method of moments	Concept	Statistics
Irreducible component	Definition	Algebraic geometry
Conjugate points	Concept	Differential geometry
Enumerative geometry	Concept	Algebraic geometry
Jacobian variety	Concept	Algebraic geometry
Progenerator	Concept	Associative rings and algebras
Fourier multiplier	Concept	Harmonic analysis on Euclidean spaces
Hardy–Littlewood circle method	Concept	Number theory
Skolem–Mahler–Lech theorem	Theorem	Number theory
Propagation of uncertainty	Definition	Numerical analysis
Voronoi cell	Definition	Convex and discrete geometry
Donaldson theory	Concept	Manifolds and cell complexes
Legendre transformation	Concept	Real functions
Locally compact abelian group	Concept	Topological groups, Lie groups
Total variation diminishing scheme	Definition	Numerical analysis
Whitney–Graustein theorem	Theorem	Manifolds and cell complexes
Drazin inverse	Definition	Linear and multilinear algebra; matrix theory
Łoś–Vaught test	Theorem	Mathematical logic and foundations
Scott topology	Concept	Order, lattices, ordered algebraic structures
Feller process	Definition	Probability theory and stochastic processes
Semiperfect ring	Concept	Associative rings and algebras
Dialectica interpretation	Definition	Mathematical logic and foundations
Holomorphically convex domain	Definition	Several complex variables and analytic spaces
Bochner's theorem	Theorem	Abstract harmonic analysis
Point estimation	Definition	Statistics
Jacobi condition	Theorem	Calculus of variations and optimal control; optimization
Support of a convolution	Proposition	Integral transforms, operational calculus
Ricci flow	Definition	Differential geometry
Horn clause	Definition	Mathematical logic and foundations
Inverse Fourier transform	Definition	Harmonic analysis on Euclidean spaces
Johnson solid	Object	Geometry
Conway knot	Example	Manifolds and cell complexes
Hodge structure	Concept	Algebraic geometry
Method of images	Concept	Potential theory
Universal class	Concept	Mathematical logic and foundations
Maximal subfield	Concept	Associative rings and algebras
Lie derivative	Definition	Differential geometry
Lefschetz number	Concept	Algebraic topology
L-infinity space	Concept	Functional analysis
Complemented lattice	Concept	Order, lattices, ordered algebraic structures
Absolute continuity	Concept	Real functions
Morley's trisector theorem	Theorem	Geometry
Projective space	Concept	Algebraic geometry
Pushforward measure	Definition	Measure and integration
Faber's theorem on interpolation	Theorem	Approximations and expansions
Input-to-state stability	Definition	Systems theory; control
Definable set	Definition	Mathematical logic and foundations
Zariski's multiplicity conjecture	Conjecture	Several complex variables and analytic spaces