Concepts
A mathematical idea. It can have more than one definition.
- Concepts 7386
- Definitions 7188
- Statements 3950
- Conjectures 117
- Problems 256
- Examples 672
- Counterexamples 88
- Objects 168
- Proofs 11
- Computations 1
- Topics 1
Ideas 6001–6150 of 7386.
| Name | Kind | Subject |
|---|---|---|
| Pfaffian system | Concept | Global analysis, analysis on manifolds |
| Continuous lattice | Concept | Order, lattices, ordered algebraic structures |
| Discrete-time Fourier transform | Concept | Harmonic analysis on Euclidean spaces |
| Lieb–Yngvason axiomatization of entropy | Concept | Classical thermodynamics, heat transfer |
| Twisted K-theory | Concept | K-theory |
| Locally cyclic group | Concept | |
| Smith–Waterman algorithm | Concept | Biology and other natural sciences |
| Cheap talk | Concept | Game theory, economics, finance, and other social and behavioral sciences |
| Closed-loop transfer function | Concept | Systems theory; control |
| Nef line bundle | Concept | Algebraic geometry |
| Nonlinear control | Concept | Systems theory; control |
| Abel–Poisson summation of Fourier series | Concept | Harmonic analysis on Euclidean spaces |
| Zak transform | Concept | Harmonic analysis on Euclidean spaces |
| Dehn invariant | Concept | Convex and discrete geometry |
| Exact functor | Concept | Category theory; homological algebra |
| Microstate | Concept | Statistical mechanics, structure of matter |
| Fundamental group | Concept | Algebraic topology |
| Optimal control of partial differential equations | Concept | Calculus of variations and optimal control; optimization |
| Minimal prime ideal | Concept | Commutative algebra |
| Karoubi envelope | Concept | Category theory; homological algebra |
| Schlegel diagram | Concept | Convex and discrete geometry |
| Socle of a module | Concept | Associative rings and algebras |
| Sheaf of modules | Concept | Algebraic geometry |
| Circle packing | Concept | Convex and discrete geometry |
| Countably compact space | Concept | General topology |
| Mixing | Concept | Dynamical systems and ergodic theory |
| Grothendieck topos | Concept | Category theory; homological algebra |
| Kernel | Concept | Category theory; homological algebra |
| Thermodynamic square | Concept | Classical thermodynamics, heat transfer |
| Levi-flat hypersurface | Concept | Several complex variables and analytic spaces |
| Torsion of a curve | Concept | Differential geometry |
| Ambient noise seismic interferometry | Concept | Geophysics |
| Bol loop | Concept | Group theory and generalizations |
| Radical ideal | Concept | Commutative algebra |
| Quasiconvex function | Concept | Real functions |
| Hecke operator | Concept | Number theory |
| Time-variant system | Concept | Systems theory; control |
| Product | Concept | Category theory; homological algebra |
| Hochschild homology | Concept | Associative rings and algebras |
| Cournot competition | Concept | Game theory, economics, finance, and other social and behavioral sciences |
| Double-couple source | Concept | Geophysics |
| Error exponent | Concept | Information and communication theory, circuits |
| Fox H-function transforms | Concept | Integral transforms, operational calculus |
| Skew polynomial ring | Concept | Associative rings and algebras |
| Multiplicative decomposition of the deformation gradient | Concept | Mechanics of deformable solids |
| Thermal radiation | Concept | Classical thermodynamics, heat transfer |
| Electroactive polymer | Concept | Mechanics of deformable solids |
| Class operators H S P | Concept | General algebraic systems |
| Shannon capacity of a graph | Concept | Combinatorics |
| K-epsilon turbulence model | Concept | Fluid mechanics |
| Green's relations | Concept | Group theory and generalizations |
| Heat engine | Concept | Classical thermodynamics, heat transfer |
| Quantum circuit | Concept | Quantum theory |
| Supersymmetry | Concept | Quantum theory |
| Frank-Kamenetskii theory of thermal explosion | Concept | Classical thermodynamics, heat transfer |
| Principal symbol of an operator on a manifold | Concept | Global analysis, analysis on manifolds |
| Bernstein algebra | Concept | Nonassociative rings and algebras |
| Thermodynamic work | Concept | Classical thermodynamics, heat transfer |
| Laplace's equation | Concept | Partial differential equations |
| Four-vector | Concept | Relativity and gravitational theory |
| Brown–Peterson cohomology | Concept | Algebraic topology |
| Persistent homology | Concept | Algebraic topology |
| Prime model | Concept | Mathematical logic and foundations |
| Bethe ansatz | Concept | Statistical mechanics, structure of matter |
| Smoothed-particle hydrodynamics | Concept | Fluid mechanics |
| Kleene's T predicate | Concept | Mathematical logic and foundations |
| Category of elements | Concept | Category theory; homological algebra |
| Henyey track | Concept | Astronomy and astrophysics |
| Genetic algebra | Concept | Nonassociative rings and algebras |
| Gibbons–Hawking–York boundary term | Concept | Relativity and gravitational theory |
| Real form of a Lie group | Concept | Topological groups, Lie groups |
| Electric potential | Concept | Optics, electromagnetic theory |
| Homological algebra | Concept | Category theory; homological algebra |
| Lagrangian density | Concept | Mechanics of particles and systems |
| Lp space | Concept | Functional analysis |
| Quaternionic analysis | Concept | Functions of a complex variable |
| Polar code | Concept | Information and communication theory, circuits |
| Artin group | Concept | Group theory and generalizations |
| Modification of a complex space | Concept | Several complex variables and analytic spaces |
| Vlasov–Poisson system | Concept | Partial differential equations |
| Initial value formulation of general relativity | Concept | Relativity and gravitational theory |
| Quasiconformal mapping | Concept | Functions of a complex variable |
| Binary quadratic form | Concept | Number theory |
| Weyl tensor | Concept | Differential geometry |
| Marsden–Weinstein reduction | Concept | Differential geometry |
| Stellar structure | Concept | Astronomy and astrophysics |
| Extremal graph theory | Concept | Combinatorics |
| Preadditive category | Concept | Category theory; homological algebra |
| Positive-definite kernel | Concept | Functional analysis |
| Embedding of structures | Concept | General algebraic systems |
| Efficient frontier | Concept | Game theory, economics, finance, and other social and behavioral sciences |
| Rossby number | Concept | Fluid mechanics |
| Universal enveloping algebra | Concept | Nonassociative rings and algebras |
| Weierstrass polynomial | Concept | Several complex variables and analytic spaces |
| Spherical code | Concept | Convex and discrete geometry |
| Fisher market | Concept | Game theory, economics, finance, and other social and behavioral sciences |
| Finite-state transducer | Concept | Computer science |
| Identity component | Concept | Topological groups, Lie groups |
| Model category | Concept | Category theory; homological algebra |
| Stochastic dynamic programming | Concept | Operations research, mathematical programming |
| Quantum chromodynamics | Concept | Quantum theory |
| Adele ring | Concept | Number theory |
| Puiseux series | Concept | Commutative algebra |
| London equations | Concept | Statistical mechanics, structure of matter |
| Block system | Concept | Group theory and generalizations |
| Linking number | Concept | Manifolds and cell complexes |
| Relaxed control | Concept | Calculus of variations and optimal control; optimization |
| Nondeterministic finite automaton | Concept | Computer science |
| Hilbertian field | Concept | Field theory and polynomials |
| Energy of a measure | Concept | Potential theory |
| Quasi-arithmetic mean | Concept | Real functions |
| Ore localization | Concept | Associative rings and algebras |
| Eddington–Finkelstein coordinates | Concept | Relativity and gravitational theory |
| Turbo code | Concept | Information and communication theory, circuits |
| Mellin convergence | Concept | Integral transforms, operational calculus |
| Ashtekar variables | Concept | Relativity and gravitational theory |
| Green's function | Concept | Ordinary differential equations |
| Isentropic flow | Concept | Fluid mechanics |
| Local class field theory | Concept | Number theory |
| Order of an entire function | Concept | Functions of a complex variable |
| Gumm terms | Concept | General algebraic systems |
| Combinatorial game theory | Concept | Game theory, economics, finance, and other social and behavioral sciences |
| Gravitational wave | Concept | Relativity and gravitational theory |
| Vlasov equation | Concept | Partial differential equations |
| Pierson–Moskowitz spectrum | Concept | Geophysics |
| Hamilton–Jacobi–Bellman equation | Concept | Calculus of variations and optimal control; optimization |
| Filtered back-projection | Concept | Integral transforms, operational calculus |
| Potential temperature | Concept | Geophysics |
| CMB angular power spectrum | Concept | Astronomy and astrophysics |
| Weak solution | Concept | Partial differential equations |
| Homotopy type | Concept | Algebraic topology |
| Peak function | Concept | Several complex variables and analytic spaces |
| Statically indeterminate structure | Concept | Mechanics of particles and systems |
| Hellinger distance | Concept | Statistics |
| Indefinite sum | Concept | Difference and functional equations |
| Null-homotopic map | Concept | Algebraic topology |
| Grothendieck universe | Concept | Mathematical logic and foundations |
| Speed of sound | Concept | Fluid mechanics |
| Left-invariant vector field | Concept | Topological groups, Lie groups |
| Volterra equation of convolution type | Concept | Integral equations |
| Generalized Fourier series | Concept | Harmonic analysis on Euclidean spaces |
| Order of a difference equation | Concept | Difference and functional equations |
| Fracture mechanics | Concept | Mechanics of deformable solids |
| Non-Euclidean geometry | Concept | Geometry |
| Entropy | Concept | Classical thermodynamics, heat transfer |
| Partial trace | Concept | Quantum theory |
| Critical exponent | Concept | Statistical mechanics, structure of matter |
| Topological group structure of a vector space | Concept | Functional analysis |
| Spherical geometry | Concept | Geometry |
| Conformal bootstrap | Concept | Quantum theory |