Mathematics
Articles about numbers, structures, logic and mathematical concepts.
Quadrilateral
Quadrivium
Quadrivium: The Four Mathematical Arts in Medieval Liberal Education
Quantity
Quart
Quart (unit of volume)
Quartic equation
Queen's Gambit
Queen's Gambit (chess opening)
A classical chess opening beginning 1.d4 d5 2.c4 in which White contests Black's central pawn. Includes Accepted, Declined and Slav systems and leads to rich strategic play and man
Quicksort
Quicksort: divide-and-conquer comparison sorting algorithm
Quicksort is a fast, in-place comparison sorting method that uses divide-and-conquer partitioning around a pivot. Widely used in practice, it is efficient on average but has worst-
Quota
Quota: Limits, Allocations, and Policy Uses
Quotient
Quotient (division result, integer quotient, and algebraic quotients)
Radian
Radian (unit of angular measure)
A radian is the standard angular unit defined by an angle whose arc length equals the circle's radius. It is dimensionless in SI and is preferred in calculus, physics, and engineer
Radical
Radical: meanings in mathematics, science, language, medicine and politics
Radius
Radius (geometry): definition, formulas, history and applications
Radix point
Ramanujan prime
Ramsey theory
Random
Random (concept)
Random mating
Random mating (panmixia) in population genetics
Random sample
Random Sample: Definition, Methods, Uses, and Limitations
Random variable
Random variable: definition, types, properties, history and applications
Random walk
Range (mathematics)
Rate
Rate (mathematics)
Ratio
Rational function
A rational function is a quotient of two polynomials. This article explains definition, singularities, asymptotic behavior, common examples, uses in calculus and engineering, and d
Rational number
A rational number is any quantity expressible as the quotient of two integers (denominator nonzero). It includes integers, finite decimals and repeating decimals, and is dense with
Rationalization (mathematics)
Real number
Reciprocal
Reciprocal (multiplicative inverse) — definition, properties and examples
The reciprocal (multiplicative inverse) of a nonzero number is 1 divided by that number. This article explains definitions, arithmetic rules, examples, and generalizations in algeb
Rectangle
Rectangle: definition, properties, uses, and related concepts
Recursion
Reductio ad absurdum
Reductio ad absurdum: method, history, and uses
Reed–Solomon error correction
Reed–Solomon error correction: principles, properties, and applications
Reflex angle
Reflexive relation
Regular expression
Regular expression (regex)
Regular polygon
A polygon that is both equilateral and equiangular: definitions, properties, constructions, examples, and distinctions including star (nonconvex) regular polygons.
Regular polytope
Relation (mathematics)
Relation (mathematics): definition, properties, and applications
A mathematical relation is a subset of a Cartesian product. This article explains n-ary and binary relations, key properties, operations, examples, historical context, and uses in
Relational model
Relational model (database design)
Remainder
Repeating decimal
Rhind Mathematical Papyrus
Rhind Mathematical Papyrus: Egypt’s Principal Mathematical Manuscript
Rho
Rhombus
Riemann hypothesis
Riemann sum
