Nodes at W1, stated

The main section of the kind, a source with a locator, and a body that passes the rules B01 to B03.

Ideas 601–750 of 1702.

Name	Kind	Subject
Conic section	Definition	Geometry
Modular multiplicative inverse	Concept	Number theory
Subbasis	Definition	General topology
Euclidean domain	Concept	Commutative algebra
Cyclic quadrilateral	Definition	Geometry
Principal ideal domain	Concept	Commutative algebra
Equivalent matrices	Concept	Linear and multilinear algebra; matrix theory
Abel's test	Theorem	Sequences, series, summability
Topological space	Definition	General topology
First-countable space	Concept	General topology
Square matrix	Definition	Linear and multilinear algebra; matrix theory
Topological space	Concept	General topology
Parabola	Definition	Geometry
Linear independence	Concept	Linear and multilinear algebra; matrix theory
Complex plane	Concept	Functions of a complex variable
Box topology	Definition	General topology
Triangle	Concept	Geometry
Partition function	Concept	Number theory
Convergent series	Definition	Sequences, series, summability
Annulus	Concept	Functions of a complex variable
Automorphism group	Definition	Group theory and generalizations
Transitive relation	Definition	Mathematical logic and foundations
Singular solution	Definition	Ordinary differential equations
Closed curve	Definition	Differential geometry
Martingale	Concept	Probability theory and stochastic processes
Dense set	Definition	General topology
Tautology	Definition	Mathematical logic and foundations
Geometric sequence	Concept	Sequences, series, summability
Restriction of a function	Definition	Mathematical logic and foundations
Harmonic number	Definition	Number theory
Integration by substitution	Theorem	Real functions
Rouché's theorem	Theorem	Functions of a complex variable
Baire space	Definition	General topology
Subspace topology	Definition	General topology
Unitary matrix	Definition	Linear and multilinear algebra; matrix theory
Conjugate subgroup	Definition	Group theory and generalizations
Binary tree	Concept	Combinatorics
Bridge	Definition	Combinatorics
Connected space	Definition	General topology
Euler's totient function	Concept	Number theory
Probability axioms	Concept	Probability theory and stochastic processes
Torsion subgroup	Concept	Group theory and generalizations
Open ball	Definition	General topology
Expected value	Definition	Probability theory and stochastic processes
Two-sided ideal	Definition	Associative rings and algebras
Elementary row operations	Definition	Linear and multilinear algebra; matrix theory
Harmonic function	Concept	Potential theory
Conjugacy class	Concept	Group theory and generalizations
Strong law of large numbers	Theorem	Probability theory and stochastic processes
Holomorphic function	Definition	Functions of a complex variable
Cauchy's integral formula	Theorem	Functions of a complex variable
Alternating bilinear form	Concept	Linear and multilinear algebra; matrix theory
Covariance	Definition	Probability theory and stochastic processes
Quadratic residue	Concept	Number theory
Random variable	Definition	Probability theory and stochastic processes
Basel problem	Theorem	Sequences, series, summability
Correlation coefficient	Concept	Statistics
Linear equation	Definition	Linear and multilinear algebra; matrix theory
Degree of a polynomial	Definition	Commutative algebra
Surface integral	Definition	Real functions
Slope field	Concept	Ordinary differential equations
Well-founded relation	Concept	Mathematical logic and foundations
Bézout's identity	Theorem	Number theory
Closure	Definition	General topology
Galois extension	Definition	Field theory and polynomials
Fundamental system of solutions	Concept	Ordinary differential equations
Set difference	Definition	Mathematical logic and foundations
Index of a subgroup	Concept	Group theory and generalizations
Linear span	Concept	Linear and multilinear algebra; matrix theory
Probability distribution	Concept	Probability theory and stochastic processes
Conjugate transpose	Concept	Linear and multilinear algebra; matrix theory
Centre of a group	Concept	Group theory and generalizations
Free module	Concept	Associative rings and algebras
Nilpotent group	Definition	Group theory and generalizations
Irrational number	Concept	Number theory
Jordan–Hölder theorem	Theorem	Group theory and generalizations
Laplacian	Concept	Partial differential equations
Riccati equation	Definition	Ordinary differential equations
Differential form	Concept	Global analysis, analysis on manifolds
Limit point	Concept	General topology
Cayley table	Definition	Group theory and generalizations
Law of total probability	Theorem	Probability theory and stochastic processes
Riemann rearrangement theorem	Theorem	Sequences, series, summability
Casting out nines	Concept	Number theory
Similar matrices	Concept	Linear and multilinear algebra; matrix theory
Exponential distribution	Concept	Probability theory and stochastic processes
Range of a function	Definition	Mathematical logic and foundations
Ceiling function	Concept	Real functions
Division ring	Concept	Field theory and polynomials
Degree of a field extension	Concept	Field theory and polynomials
Invertible matrix	Concept	Linear and multilinear algebra; matrix theory
Cardinal number	Concept	Mathematical logic and foundations
Exact equation	Definition	Ordinary differential equations
Empty set	Object	Mathematical logic and foundations
Hamiltonian system	Concept	Dynamical systems and ergodic theory
Neyman–Pearson lemma	Lemma	Statistics
Limit cycle	Definition	Ordinary differential equations
Concave function	Definition	Real functions
Convergence in probability	Definition	Probability theory and stochastic processes
Primality test	Concept	Number theory
Boole's inequality	Theorem	Probability theory and stochastic processes
Prime number theorem	Theorem	Number theory
Liouville's theorem	Theorem	Functions of a complex variable
Binomial theorem	Theorem	Combinatorics
P-value	Definition	Statistics
Normal convergence	Concept	Sequences, series, summability
Hermitian matrix	Definition	Linear and multilinear algebra; matrix theory
Orientable surface	Definition	Differential geometry
Chi-squared test	Concept	Statistics
Normal operator	Definition	Operator theory
Invariant subspace	Definition	Linear and multilinear algebra; matrix theory
Row space	Definition	Linear and multilinear algebra; matrix theory
Function	Concept	Mathematical logic and foundations
Linear subspace	Definition	Linear and multilinear algebra; matrix theory
Central limit theorem	Theorem	Probability theory and stochastic processes
Hyperbolic cosine	Definition	Special functions
Locally compact space	Definition	General topology
Field extension	Concept	Field theory and polynomials
Induced subgraph	Concept	Combinatorics
QR decomposition	Theorem	Linear and multilinear algebra; matrix theory
Imaginary unit	Object	Field theory and polynomials
Collinear points	Definition	Geometry
Gershgorin circle theorem	Theorem	Linear and multilinear algebra; matrix theory
Linear independence	Definition	Linear and multilinear algebra; matrix theory
Poincaré–Bendixson theorem	Theorem	Ordinary differential equations
Beta distribution	Concept	Probability theory and stochastic processes
Rank of a matrix	Definition	Linear and multilinear algebra; matrix theory
Conjugate transpose	Definition	Linear and multilinear algebra; matrix theory
Product of vector spaces	Concept	Linear and multilinear algebra; matrix theory
Element	Definition	Mathematical logic and foundations
Cantor's intersection theorem	Theorem	General topology
Lower triangular matrix	Definition	Linear and multilinear algebra; matrix theory
Column space	Definition	Linear and multilinear algebra; matrix theory
Well-order	Definition	Order, lattices, ordered algebraic structures
Transition matrix	Definition	Probability theory and stochastic processes
Subsequence	Concept	Sequences, series, summability
Derivative	Definition	Real functions
Field of fractions	Concept	Commutative algebra
Lyapunov stability	Concept	Ordinary differential equations
Primitive root modulo n	Concept	Number theory
Mersenne prime	Concept	Number theory
Transition matrix	Concept	Probability theory and stochastic processes
Outcome	Concept	Probability theory and stochastic processes
Characteristic of a ring	Concept	Commutative algebra
Disjunction	Concept	Mathematical logic and foundations
Cayley–Hamilton theorem	Theorem	Linear and multilinear algebra; matrix theory
Square root	Concept	Real functions
Graph isomorphism	Concept	Combinatorics
Group of units of Z/nZ	Object	Number theory
Codomain	Definition	Mathematical logic and foundations