Mathematics
Articles about numbers, structures, logic and mathematical concepts.
Topological space
Topology
Topology: the mathematical study of space, continuity and shape
An introduction to topology: its basic concepts, main branches (point-set, algebraic, differential), history, examples, and applications across mathematics and science.
Toroid (geometry)
Torsion
Torsion: twisting in biology, mathematics, medicine and mechanics
Torus
Transcendental number
Transfinite number
Transformation
Transformation (mathematics)
A mathematical transformation is a rule that maps points between coordinate systems or within a space. It includes linear, affine, projective and non‑linear types and is central to
Transitivity (mathematics)
Transitivity is a structural property of a binary relation: whenever a relation links a to b and b to c, it also links a to c. It underpins equivalence relations and partial orders
Transpose
Transpose (matrix operation)
The transpose of a matrix or vector swaps rows and columns. This article explains the definition, basic properties, common notation, examples, and where the transpose is used in ma
Transposition
Trapezoid
Trapezoid (Trapezium) — Definition, Properties, and Uses
Travelling salesman problem
Travelling Salesman Problem (TSP)
Triacontadigon
Triacontagon
Triacontagon (30-sided polygon)
Triangle
Triangle (basic geometry and properties)
Triangular number
Trigonometric function
Trigonometric functions
Trigonometry
Trigonometry: functions, principles, history, and applications
Trillion
Truncated differential cryptanalysis
Truncated icosahedron
Truncated octahedron
Tuple
Tuple: ordered finite sequences in mathematics and computing
Turing complete
Turing complete (Turing completeness in computation)
Twin prime
Twin prime conjecture
Type I and type II errors
Type I and Type II Errors in Hypothesis Testing
Uncountable set
Unit
Unit circle
Unit vector
Unit vector: definition, properties and common uses
Unitary
United States customary units
Universal quantifier
Universe of discourse
Unknown (math)
Unknown (mathematics): variables, notation, history, and uses
UNO
UNO: card game, numeral, and common acronyms
Validated numerics
Validated numerics (reliable computation)
Variable
Variable (mathematics, science, and computing)
Variance
Variance (probability and statistics)
Variance quantifies dispersion by averaging squared deviations from the mean. It is nonnegative, measured in squared units, and underpins standard deviation, risk measures and many
Vector
Vector (mathematics and physics)
A vector is a mathematical object with magnitude and direction. Covers definitions, representations, operations (addition, dot and cross), history and common applications in scienc
Vector calculus
Vector calculus: concepts, operators, history and applications
Vector field
Vector field (mathematics and physical interpretation)
Vector space
A vector space is a set of objects called vectors closed under addition and scalar multiplication; it is the central structure of linear algebra with bases, dimension and many appl