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 301–450 of 1702.

Name	Kind	Subject
Surface integral	Concept	Real functions
Area of a triangle	Concept	Geometry
De Moivre–Laplace theorem	Theorem	Probability theory and stochastic processes
Radius of convergence	Definition	Functions of a complex variable
Noetherian ring	Concept	Commutative algebra
Flow of a vector field	Concept	Dynamical systems and ergodic theory
Autonomous system	Concept	Ordinary differential equations
Scalar matrix	Concept	Linear and multilinear algebra; matrix theory
Hessian matrix	Concept	Real functions
Triple integral	Concept	Real functions
Comparison of a series and an integral	Proposition	Real functions
Row space	Concept	Linear and multilinear algebra; matrix theory
Heine–Cantor theorem	Theorem	General topology
Reflection	Concept	Linear and multilinear algebra; matrix theory
Five colour theorem	Theorem	Combinatorics
Symmetric polynomial	Definition	Combinatorics
P-group	Definition	Group theory and generalizations
Identity matrix	Object	Linear and multilinear algebra; matrix theory
Fréchet derivative	Concept	Functional analysis
Operator norm	Concept	Operator theory
Basis of a topology	Definition	General topology
Midpoint	Definition	Geometry
Boolean algebra	Definition	Order, lattices, ordered algebraic structures
Mersenne prime	Definition	Number theory
Logical equivalence	Definition	Mathematical logic and foundations
Banach space	Concept	Functional analysis
Prime ideal	Definition	Commutative algebra
Spectral theorem	Theorem	Operator theory
Classification of finite simple groups	Theorem	Group theory and generalizations
Branch cut	Definition	Functions of a complex variable
Directional derivative	Concept	Real functions
Inflection point	Concept	Real functions
Fermat prime	Concept	Number theory
Cauchy criterion for series	Theorem	Sequences, series, summability
P-group	Concept	Group theory and generalizations
Commutator of two elements	Definition	Group theory and generalizations
Disjunctive normal form	Definition	Mathematical logic and foundations
Graph homomorphism	Definition	Combinatorics
Continuously differentiable function	Definition	Real functions
Buffon's needle problem	Problem	Probability theory and stochastic processes
Simple continued fraction	Definition	Number theory
Decimal expansion	Definition	Number theory
Unique factorisation domain	Definition	Commutative algebra
Contour integral	Concept	Functions of a complex variable
Argument of a complex number	Concept	Functions of a complex variable
Finite set	Concept	Mathematical logic and foundations
Maximal element	Concept	Order, lattices, ordered algebraic structures
Formal power series	Definition	Commutative algebra
Symmetric bilinear form	Definition	Linear and multilinear algebra; matrix theory
Gaussian integer	Concept	Number theory
Simply connected domain	Definition	Algebraic topology
Initial value problem	Definition	Ordinary differential equations
Matrix multiplication	Definition	Linear and multilinear algebra; matrix theory
Orthogonal complement	Definition	Linear and multilinear algebra; matrix theory
Transcendental number	Definition	Number theory
Autonomous system	Definition	Ordinary differential equations
Nilpotent matrix	Concept	Linear and multilinear algebra; matrix theory
Conjunctive normal form	Definition	Mathematical logic and foundations
Cycle	Definition	Combinatorics
Integrating factor	Concept	Ordinary differential equations
Bipartite graph	Definition	Combinatorics
Cauchy–Hadamard theorem	Theorem	Functions of a complex variable
Limit point of a set	Definition	Real functions
Newton's method	Concept	Numerical analysis
Signature of a quadratic form	Concept	Linear and multilinear algebra; matrix theory
Complex exponential	Concept	Special functions
Function composition	Definition	Mathematical logic and foundations
Pépin's test	Theorem	Number theory
Dual space	Concept	Linear and multilinear algebra; matrix theory
Union	Definition	Mathematical logic and foundations
Liouville function	Concept	Number theory
Menelaus's theorem	Theorem	Geometry
Heine–Borel theorem	Theorem	General topology
Trace of a matrix	Definition	Linear and multilinear algebra; matrix theory
Möbius inversion formula	Theorem	Number theory
Convex function	Concept	Real functions
Normal distribution	Definition	Probability theory and stochastic processes
T0 space	Concept	General topology
Diagonalisable matrix	Concept	Linear and multilinear algebra; matrix theory
Recurrence relation	Definition	Difference and functional equations
Young's inequality for products	Theorem	Real functions
Adjugate matrix	Concept	Linear and multilinear algebra; matrix theory
Inverse Laplace transform	Concept	Integral transforms, operational calculus
Identity element	Concept	General algebraic systems
Median	Concept	Probability theory and stochastic processes
Linear form	Concept	Linear and multilinear algebra; matrix theory
Irrational number	Definition	Number theory
Rational root theorem	Theorem	Field theory and polynomials
Linear recurrence with constant coefficients	Definition	Difference and functional equations
Analytic function	Concept	Real functions
Finitely generated group	Concept	Group theory and generalizations
Equivalence class	Definition	Mathematical logic and foundations
Intersection of a family of sets	Definition	Mathematical logic and foundations
Fundamental theorem of arithmetic	Theorem	Number theory
Subring	Definition	Associative rings and algebras
Angle bisector theorem	Theorem	Geometry
Jordan normal form	Theorem	Linear and multilinear algebra; matrix theory
Law of quadratic reciprocity	Theorem	Number theory
Fermat's right triangle theorem	Theorem	Number theory
Predicate logic	Concept	Mathematical logic and foundations
Graph colouring	Definition	Combinatorics
Isometry	Definition	General topology
von Mangoldt function	Definition	Number theory
Statistical hypothesis test	Concept	Statistics
Translation	Concept	Geometry
Positive semidefinite matrix	Definition	Linear and multilinear algebra; matrix theory
Ring	Definition	Associative rings and algebras
Periodic function	Definition	Real functions
Moment of inertia	Concept	Real functions
Independent set	Concept	Combinatorics
Diophantine equation	Concept	Number theory
Adjacency matrix	Concept	Combinatorics
Binary relation	Definition	Mathematical logic and foundations
Fréchet derivative	Definition	Functional analysis
Complete metric space	Definition	General topology
Uniform convergence	Definition	Sequences, series, summability
Floor function	Concept	Real functions
Exterior algebra	Definition	Linear and multilinear algebra; matrix theory
Real numbers	Object	Real functions
Tutte's theorem	Theorem	Combinatorics
Cyclotomic polynomial	Concept	Number theory
Norm	Definition	Functional analysis
Partition of a set	Concept	Mathematical logic and foundations
Cesàro mean	Concept	Sequences, series, summability
Liouville function	Definition	Number theory
Finite field	Definition	Field theory and polynomials
Normal extension	Concept	Field theory and polynomials
Commutator subgroup	Definition	Group theory and generalizations
Permutation matrix	Concept	Linear and multilinear algebra; matrix theory
Uniform convergence	Concept	Sequences, series, summability
Median	Definition	Probability theory and stochastic processes
Cauchy–Binet formula	Theorem	Linear and multilinear algebra; matrix theory
Square-free integer	Concept	Number theory
Integration by parts	Theorem	Real functions
Steinitz exchange lemma	Lemma	Linear and multilinear algebra; matrix theory
Alternating bilinear form	Definition	Linear and multilinear algebra; matrix theory
Hamiltonian graph	Definition	Combinatorics
Arithmetic function	Concept	Number theory
Metrizable space	Concept	General topology
Euler's identity	Corollary	Special functions
Catalan numbers	Definition	Combinatorics
Binomial coefficient	Definition	Combinatorics
Lyapunov stability	Definition	Ordinary differential equations
Domain	Definition	Mathematical logic and foundations
Divisibility	Definition	Number theory
Ideal	Concept	Commutative algebra
Central moment	Concept	Probability theory and stochastic processes
Cramer's rule	Theorem	Linear and multilinear algebra; matrix theory
Combination	Concept	Combinatorics
Peano existence theorem	Theorem	Ordinary differential equations