Mathematics
Articles about numbers, structures, logic and mathematical concepts.
Computus
Concatenation
Concentric
Conceptual metaphor
Cone
Congruence
Conic section
Conjecture
Conjecture (mathematics): definition, history, and significance
Conjugate variables
Conjugate variables in classical and quantum theory
Connect Four
Connect Four: rules, play, history and strategy
Consecutive integer
Consistency
Consistency (concept)
Consistency proof
Constant
Constant (mathematics, physics, and computer science)
Constant function
Constraint
Constructive proof
Continuous function
Continuum hypothesis
Contour line
Contradiction
Conversion of units
Conversion of units: principles, methods, history and common examples
Convex function
Convex regular 4-polytope
Convex Regular 4‑Polytopes (Regular Polychora)
Convex set
Conway's Game of Life
Conway's Game of Life: a cellular automaton and zero-player simulation
Cook–Levin theorem
Cook–Levin theorem: SAT as the first NP-complete problem
Coordinate system
Coprime
Coprime (Relatively Prime) Numbers
Corollary
Correlation
Coset
Coset (group theory)
Countable set
Countable set (mathematics)
Countdown
Counting
Counting: principles, methods, history and applications
Crelle's Journal
Crelle's Journal (Journal für die reine und angewandte Mathematik)
Crore
Cross product
Cross product (vector product)
The cross product is a binary operation on two three-dimensional vectors that yields a third vector perpendicular to both, with magnitude equal to the parallelogram area; widely us
Cross section (geometry)
Cryptanalysis
Cryptographic hash function
Cryptographic hash function: properties, history, and applications
Cryptosystem
Cryptosystem: definitions, structure, history and uses
Cube
Cubic centimetre
Cubic centimetre (cm³, cc): definition, conversions and common uses
Cubic foot
Cubic foot (ft³): definition, conversions, uses, and distinctions
Cubic inch
Cubic inch (in³): definition, conversions, history and common uses
Cubic metre
Cubic metre (m³) — SI unit of volume
Cubit
Cubit — ancient unit of length based on the forearm