Concepts

A mathematical idea. It can have more than one definition.

Ideas 1–150 of 5206.

Name	Kind	Subject
Vector space	Concept	Linear and multilinear algebra; matrix theory
Quotient set	Concept	Mathematical logic and foundations
Mutual independence of events	Concept	Probability theory and stochastic processes
Block diagonal matrix	Concept	Linear and multilinear algebra; matrix theory
Differential equation	Concept	Ordinary differential equations
Jump discontinuity	Concept	Real functions
Sylow p-subgroup	Concept	Group theory and generalizations
Row equivalence	Concept	Linear and multilinear algebra; matrix theory
Quotient ring	Concept	Associative rings and algebras
Least common multiple	Concept	Number theory
Composite number	Concept	Number theory
One-sided limit	Concept	Real functions
Composition of linear maps	Concept	Linear and multilinear algebra; matrix theory
Graph	Concept	Combinatorics
Countably infinite set	Concept	Mathematical logic and foundations
Power set	Concept	Mathematical logic and foundations
Hasse diagram	Concept	Order, lattices, ordered algebraic structures
Closed map	Concept	General topology
Zero of a holomorphic function	Concept	Functions of a complex variable
Direct product of groups	Concept	Group theory and generalizations
Conic section	Concept	Geometry
Lower triangular matrix	Concept	Linear and multilinear algebra; matrix theory
Divisibility rule	Concept	Number theory
Determinant	Concept	Linear and multilinear algebra; matrix theory
Prime ideal	Concept	Commutative algebra
Independent and identically distributed random variables	Concept	Probability theory and stochastic processes
Prior probability	Concept	Statistics
Complex sine and cosine	Concept	Special functions
Primitive element of a finite field	Concept	Field theory and polynomials
Gram matrix	Concept	Linear and multilinear algebra; matrix theory
Little o notation	Concept	Approximations and expansions
Linear subspace	Concept	Linear and multilinear algebra; matrix theory
Arcsine	Concept	Special functions
Topological embedding	Concept	General topology
Strictly monotone function	Concept	Real functions
Hölder continuity	Concept	Real functions
Reduction formula	Concept	Real functions
Glide reflection	Concept	Geometry
Principal branch	Concept	Functions of a complex variable
Platonic solid	Concept	Geometry
Prime number	Concept	Number theory
Vector-valued function	Concept	Real functions
Root of a polynomial	Concept	Commutative algebra
Preimage of a set	Concept	Mathematical logic and foundations
Well-order	Concept	Order, lattices, ordered algebraic structures
Public-key cryptography	Concept	Information and communication theory, circuits
Law of a random variable	Concept	Probability theory and stochastic processes
Periodic continued fraction	Concept	Number theory
Generalised eigenvector	Concept	Linear and multilinear algebra; matrix theory
Maximal solution	Concept	Ordinary differential equations
Regular polygon	Concept	Geometry
Positive semidefinite matrix	Concept	Linear and multilinear algebra; matrix theory
Nondegenerate bilinear form	Concept	Linear and multilinear algebra; matrix theory
Hyperbolic functions	Concept	Special functions
Spherical coordinates	Concept	Geometry
Tangent line	Concept	Real functions
Definite and indefinite quadratic forms	Concept	Linear and multilinear algebra; matrix theory
Elementary matrix	Concept	Linear and multilinear algebra; matrix theory
Lyapunov function	Concept	Ordinary differential equations
Residue class	Concept	Number theory
Surjective function	Concept	Mathematical logic and foundations
Hyperbolic equilibrium point	Concept	Dynamical systems and ergodic theory
Countable set	Concept	Mathematical logic and foundations
Orthogonal family for a bilinear form	Concept	Linear and multilinear algebra; matrix theory
Prime element	Concept	Commutative algebra
Moment	Concept	Probability theory and stochastic processes
Constructive proof	Concept	Mathematical logic and foundations
Limit at infinity	Concept	Real functions
Matrix exponential	Concept	Linear and multilinear algebra; matrix theory
Totally bounded set	Concept	General topology
Order of cardinals	Concept	Mathematical logic and foundations
Euclidean algorithm in a Euclidean domain	Concept	Commutative algebra
Conjunction	Concept	Mathematical logic and foundations
First integral	Concept	Ordinary differential equations
Flux through a surface	Concept	Real functions
Associate elements	Concept	Commutative algebra
Vector field	Concept	Real functions
Negation	Concept	Mathematical logic and foundations
Convex set	Concept	Convex and discrete geometry
Open set	Concept	General topology
Cardinality of a finite set	Concept	Mathematical logic and foundations
Sign of a permutation	Concept	Group theory and generalizations
Power of a point	Concept	Geometry
Prime factorization	Concept	Number theory
Transitive action	Concept	Group theory and generalizations
Isometry	Concept	General topology
Nullcline	Concept	Ordinary differential equations
Monotone sequence	Concept	Sequences, series, summability
Polynomial evaluation	Concept	Commutative algebra
Discrete uniform distribution	Concept	Probability theory and stochastic processes
Complex logarithm	Concept	Special functions
Line integral of a scalar field	Concept	Real functions
Multiplicative order	Concept	Number theory
Topological property	Concept	General topology
Reduction of order	Concept	Ordinary differential equations
Branch of the logarithm	Concept	Special functions
Centraliser	Concept	Group theory and generalizations
One-form	Concept	Global analysis, analysis on manifolds
Partial fraction decomposition	Concept	Real functions
Commutative ring	Concept	Commutative algebra
Event	Concept	Probability theory and stochastic processes
Polyhedron	Concept	Convex and discrete geometry
Matrix multiplication	Concept	Linear and multilinear algebra; matrix theory
Projection	Concept	Linear and multilinear algebra; matrix theory
Nine-point circle	Concept	Geometry
Limit inferior	Concept	Sequences, series, summability
Formal power series	Concept	Commutative algebra
Tangent plane to a graph	Concept	Real functions
Hyperbolic cosine	Concept	Special functions
Dirichlet convolution	Concept	Number theory
System of linear differential equations	Concept	Ordinary differential equations
Bernoulli distribution	Concept	Probability theory and stochastic processes
Parametric equation of a line	Concept	Geometry
Independence of two events	Concept	Probability theory and stochastic processes
Column space	Concept	Linear and multilinear algebra; matrix theory
Absorbing Markov chain	Concept	Probability theory and stochastic processes
Modulo operation	Concept	Number theory
Multivalued function	Concept	Real functions
Left coset	Concept	Group theory and generalizations
Cauchy–Euler equation	Concept	Ordinary differential equations
Range of a function	Concept	Mathematical logic and foundations
Irreducible polynomial	Concept	Field theory and polynomials
Dimension	Concept	Linear and multilinear algebra; matrix theory
P-adic valuation	Concept	Number theory
Antichain	Concept	Order, lattices, ordered algebraic structures
Regular space	Concept	General topology
Normed vector space	Concept	Functional analysis
Type I and type II errors	Concept	Statistics
Path	Concept	Combinatorics
Minimal polynomial	Concept	Linear and multilinear algebra; matrix theory
Second-countable space	Concept	General topology
Continuous linear map	Concept	Operator theory
Integers modulo n	Concept	Number theory
Circumcircle	Concept	Geometry
Sample mean	Concept	Statistics
Oriented angle	Concept	Geometry
Lattice path	Concept	Combinatorics
Multilinear map	Concept	Linear and multilinear algebra; matrix theory
Diagonal matrix	Concept	Linear and multilinear algebra; matrix theory
Random variable with a density	Concept	Probability theory and stochastic processes
Closed curve	Concept	Differential geometry
Homogeneous linear system with constant coefficients	Concept	Ordinary differential equations
Evaluation of real integrals by residues	Concept	Functions of a complex variable
Variance	Concept	Probability theory and stochastic processes
Jacobian matrix	Concept	Real functions
Multiplicity of a root	Concept	Commutative algebra
Concyclic points	Concept	Geometry
Open cover	Concept	General topology
Greedy colouring	Concept	Combinatorics
Field	Concept	Field theory and polynomials