- C
- C*-algebra
- C*-algebra representation or C-*-algebra representation
- C++
- C-*
- C-*-Algebra or C-*-algebra
- C-algebra
- C-function
- C-infinity function
- C-infty function
- C-k function
- C-Net
- Cable
- Cable knot
- Cabtaxi number
- CAD or Cad
- Cadlag function
- Café wall illusion
- Cahen's constant
- Cahn-Hilliard Equation or Cahn-Hilliard equation
- Cake cutting
- Cake numbers
- Cake-cutting problem
- Cal
- Calabi conjecture
- Calabi-Yau conjectures
- Calabi-Yau manifold or Calabi-yau manifold
- Calabi-Yau space
- Calabi-Yau variety
- Calcidius
- Calculator
- Calculus
- Calculus of variations
- Calibration
- Calibre
- Campbell-Hausdorff formula
- Canal surface
- Cancellation
- Cancellation law
- Cancellation ring
- Canonical
- Canonical basis
- Canonical box matrix
- Canonical bundle
- Canonical class
- Canonical correlation
- Canonical form
- Canonical height
- Canonical quantization
- Canonical Transformation or Canonical transformation
- Cantor comb
- Cantor diagonal argument
- Cantor diagonal method
- Cantor diagonal slash
- Cantor Dust or Cantor dust
- Cantor function
- Cantor normal form
- Cantor paradox
- Cantor set
- Cantor space
- Cantor theorem
- Cantor's diagonal argument
- Cantor's Paradox or Cantor's paradox
- Cantor's Theorem or Cantor's theorem
- Cantor-Bendixson theorem
- Cantor-Dedekind axiom
- Cantor–Bernstein–Schroeder theorem
- Cap
- Cap product
- Cap-product
- Capacity
- Capacity dimension
- Capping
- Capsule
- Carathéodory measure
- Carathéodory theorem
- Carathéodory's theorem
- Carathéodory's theorem (convex hull)
- Cardano formula
- Cardano's formula
- Cardano's formulae
- Cardinal addition
- Cardinal comparison
- Cardinal exponentiation
- Cardinal multiplication
- Cardinal number or Cardinal Number
- Cardinality
- Cardinality of the continuum
- Cardioid
- Cards
- Caret
- Carl Friedrich Gauss or Carl friedrich gauss
- Carl Gustav Jacob Jacobi
- Carl Pomerance or Carl pomerance
- Carleman inequality
- Carleman's criterion
- Carleman's inequality
- Carleson measure
- Carlson's theorem
- Carmichael function
- Carmichael Number or Carmichael number
- Carmichael's theorem
- Carnot theorem
- Carnot's theorem
- Carol Karp
- Carol number
- Carpenter's square
- Carry
- Carrying capacity
- Cartan algebra
- Cartan criterion
- Cartan decomposition
- Cartan involution
- Cartan matrix
- Cartan subalgebra
- Cartan subgroup
- Cartan theorem
- Cartan's criterion
- Carter subgroup
- Cartesian
- Cartesian closed category
- Cartesian coordinates
- Cartesian equation
- Cartesian geometry
- Cartesian orthogonal coordinate system
- Cartesian plane
- Cartesian product or Cartesian Product
- Cartesian space
- Cartesian square
- Cartesian tensor
- Cartesian-closed category
- Cartier divisor
- Cartographic projection
- Cartography
- Cascade
- Casimir operator
- Casorati-Weierstrass theorem
- Cassini and Catalan identities
- Cassini ellipses
- Cassini oval
- Cassini ovals
- Cassini projection
- Cassini's identity or Cassini's Identity
- Casson handle
- Casson invariant
- Casting out nines
- Casus irreducibilis
- Cat map
- Cat's Cradle or Cat's cradle
- Catalan
- Catalan constant
- Catalan number
- Catalan solid
- Catalan's conjecture
- Catalan's constant
- Catalan's identity
- Catastrophe
- Catastrophe theory
- Categorial grammar
- Categorical (model theory)
- Categorical duality
- Categorical logic
- Categorical pullback
- Categorical variable
- Category (mathematics)
- Category of a set
- Category of groups
- Category of modules
- Category of sets
- Category product
- Category theory or Category Theory
- Catenary
- Catenoid
- Caterpillar
- Cathetus
- Catoptrics
- Catullus
- Cauchy boundary conditions
- Cauchy condensation test
- Cauchy condition
- Cauchy criteria
- Cauchy criterion
- Cauchy data
- Cauchy distribution or Cauchy Distribution
- Cauchy equation
- Cauchy filter
- Cauchy Functional Equation or Cauchy functional equation
- Cauchy inequality
- Cauchy initial value problem
- Cauchy integral
- Cauchy integral formula
- Cauchy integral test
- Cauchy integral theorem
- Cauchy matrix
- Cauchy mean theorem
- Cauchy principal value or Cauchy Principal Value
- Cauchy problem
- Cauchy product or Cauchy Product
- Cauchy residue formula
- Cauchy residue theorem
- Cauchy root test
- Cauchy sequence
- Cauchy test
- Cauchy theorem
- Cauchy's convergence test
- Cauchy's Formula or Cauchy's formula
- Cauchy's inequality
- Cauchy's Mean Value Theorem or Cauchy's mean value theorem
- Cauchy's root test
- Cauchy's Theorem or Cauchy's theorem
- Cauchy's theorem (group theory)
- Cauchy-Binet formula
- Cauchy-Davenport theorem
- Cauchy-Frobenius lemma
- Cauchy-Kovalevskaya theorem
- Cauchy-Kowalewski Theorem or Cauchy-Kowalewski theorem
- Cauchy-Lagrange identity
- Cauchy-Riemann conditions
- Cauchy-Riemann equations or Cauchy-riemann equations or Cauchy-Riemann Equations
- Cauchy-Schwarz inequality or Cauchy-Schwarz Inequality
- Caustic
- Cavalieri principle
- Cavalieri's Principle or Cavalieri's principle
- Cayley algebra
- Cayley cubic
- Cayley graph or Cayley Graph
- Cayley number
- Cayley numbers
- Cayley plane
- Cayley surface
- Cayley table
- Cayley transform
- Cayley tree
- Cayley's Group Theorem or Cayley's group theorem
- Cayley-Bacharach theorem
- Cayley-Dickson algebra
- Cayley-Dickson construction
- Cayley-Hamilton theorem or Cayley-hamilton theorem or Cayley-Hamilton Theorem
- Cayley-Menger determinant
- Cayley-Purser algorithm
- Cd or CD
- CDF or Cdf
- Cech cohomology or Čech cohomology
- Ceiling
- Ceiling function
- Celestial equator
- Celestial sphere
- Cell
- Cell complex
- Cellular Automaton or Cellular automaton
- Cellular homology
- Center
- Center (rings)
- Center of a group
- Center of Curvature or Center of curvature
- Center of Gravity or Center of gravity
- Center of Mass or Center of mass
- Centered cube number
- Centered hexagonal number
- Centered pentagonal number
- Centered polygonal number
- Centered square number
- Centered Tree or Centered tree
- Centered triangular number
- Centillion
- Central angle
- Central binomial coefficient
- Central character
- Central difference
- Central limit theorem or Central Limit Theorem
- Central Line or Central line
- Central moment
- Central Point
- Central product of groups
- Central series of a group
- Central simple algebra
- Central Tree
- Centralizer
- Centre
- Centre manifold
- Centre of a group
- Centre of a ring
- Centre of mass
- Centroid
- Centrosymmetric matrix
- Certificate of primality
- Cesàro curve
- Cesàro equation
- Cesàro mean or Cesáro mean
- Cesáro mean
- Ceva theorem
- Ceva's theorem or Ceva's Theorem
- Cevian
- CG or Cg
- CGS or Cgs
- Ch or CH
- Chain
- Chain (mathematics)
- Chain complex
- Chain condition
- Chain fraction
- Chain homotopy
- Chain ring
- Chain rule or Chain Rule
- Chain rule (several variables)
- Chained Arrow Notation or Chained arrow notation
- Chair
- Chaitin's constant
- Chaitin's Omega or Chaitin's omega
- Chamber
- Champernowne constant
- Champernowne's constant
- Change of variables theorem
- Chaos
- Chaos game
- Chaotic dynamical system
- Chaplygin's equation
- Chapman-Kolmogorov equation
- Character
- Character group
- Character of a finite group
- Character of a group
- Character of a representation of a group
- Character table
- Character theory
- Characteristic
- Characteristic (mathematics)
- Characteristic class
- Characteristic equation
- Characteristic function
- Characteristic function of a set
- Characteristic map
- Characteristic mapping
- Characteristic of a field
- Characteristic polynomial
- Characteristic root
- Characteristic subgroup
- Characteristic value
- Characteristically simple group
- Characterization
- Characterization (mathematics)
- Charge
- Charles Fefferman
- Chart
- Chasles theorem
- Chasles's theorem
- Chauvenet Prize
- Chebotarev density theorem
- Chebyshev
- Chebyshev approximation
- Chebyshev differential equation
- Chebyshev equation
- Chebyshev function
- Chebyshev functions
- Chebyshev inequality
- Chebyshev polynomial
- Chebyshev polynomials
- Chebyshev sum inequality
- Chebyshev theorem
- Chebyshev's inequality
- Chebyshev's theorem
- Checker-Jumping Problem
- Checkerboard
- Checkers
- Checksum
- Chen Jingrun or Chen jingrun
- Chen prime
- Chen's theorem
- Chern character
- Chern class
- Chern number
- Chernoff face
- Cheryl Praeger
- Chess
- Chessboard
- Chevalley basis
- Chevalley group
- Chevalley groups
- Chevalley theorem
- Chevalley's theorem
- Chevalley-Waring theorem
- Chevron
- Chi
- Chi distribution
- Chi-squared distribution
- Chi-squared statistic
- Chi-squared test
- Child
- Child node (of a tree)
- Chinese Checkers or Chinese checkers
- Chinese Chess or Chinese chess
- Chinese congruence
- Chinese hypothesis
- Chinese postman problem
- Chinese remainder theorem or Chinese Remainder Theorem
- Chinese rings
- Chinese theorem
- Chiral
- Chiral anomaly
- Enantiomer
- Enantiomorph
- Enantiomorphous
- Chisini mean
- Choice Axiom or Choice axiom
- Choice function
- Cholesky decomposition
- Cholesky factorization
- Chomsky hierarchy
- Chomsky normal form
- Choose
- Choquet integral
- Choquet theory
- Chord
- Chord (geometry)
- Chordal
- Chordal graph
- Chordless cycle
- Chow coordinates
- Chow ring
- Chow theorem
- Chowla-Selberg formula
- Christine Ladd-Franklin
- Christoffel symbol
- Christoffel symbol of the second kind
- Christoffel symbols
- Chromatic number
- Chromatic polynomial
- Chu space
- Chu-Vandermonde identity
- Chuck-a-luck
- Church integer
- Church numeral
- Church thesis
- Church's Theorem or Church's theorem
- Church's thesis
- Church-Rosser theorem
- Church-Turing Thesis or Church-Turing thesis or Church-turing thesis
- Chvátal's art gallery theorem
- Ci
- Cicero
- Cigarettes
- Cin
- Cipher
- Cipher text
- Ciphers
- Ciphertext
- Circle
- Circle bundle
- Circle map
- Circle method
- Circle of curvature
- Circle power
- Circuit
- Circuit Rank or Circuit rank
- Circulant graph
- Circulant matrix
- Circular cylinder
- Circular functions
- Circular permutation
- Circular reasoning
- Circular sector
- Circular segment
- Circulation
- Circumcenter
- Circumcircle
- Circumference
- Circumflex
- Circuminscribed
- Circumradius
- Circumscribe
- Circumscribed
- Circumsphere
- Cis
- Cissoid
- Cissoid of Diocles
- City-block metric
- Clairaut equation
- Clairaut's differential equation
- Clairaut's equation
- Clairaut's theorem
- Clarity
- Class
- Class (set theory)
- Class equation
- Class field
- Class field theory
- Class function
- Class group
- Class mark
- Class number
- Class number formula
- Class representative
- Classical canonical form
- Classical group
- Classical groups
- Classical ring of quotients
- Classification
- Classification of discontinuities
- Classification theorem
- Classification theorem of finite groups
- Classification theorem of surfaces
- Classifying space
- Clause
- Clausen function
- Claw
- Cleaver
- Clebsch-Gordan Coefficient or Clebsch-Gordan coefficient
- Clifford algebra or Clifford Algebra
- Clifford bundle
- Clifford theorem
- Clifford theory
- Clifford's curve theorem
- Clique
- Clique (graph theory)
- Clique graph
- Clock Arithmetic or Clock arithmetic
- Clock solitaire
- Clone
- Clopen
- Clopen subset
- Close Packing or Close packing
- Closed
- Closed (differential form)
- Closed ball
- Closed category
- Closed curve
- Closed curve theorem
- Closed disk
- Closed form
- Closed formula
- Closed graph theorem
- Closed immersion
- Closed interval
- Closed manifold
- Closed map
- Closed mapping
- Closed monoidal category
- Closed operator
- Closed set
- Closed subgroup
- Closed subscheme
- Closed unbounded operator
- Closed-form solution
- Closed-graph theorem
- Closure
- Closure (mathematics)
- Closure (topology)
- Closure axioms
- Closure of a set
- Closure of an operator
- Closure-finite
- Clothoid
- Clove hitch
- Club
- Club filter
- Club set
- Clubsuit
- Cluster
- Cluster Analysis or Cluster analysis
- Cluster sampling
- CM-field
- Cn
- Co-algebra
- Co-planar vectors
- Coadjoint action
- Coadjoint orbit
- Coadjoint representation
- Coalgebra
- Coalition
- Coanalytic Set or Coanalytic set
- Coarse graining
- Coarse moduli scheme
- Coastline paradox
- Cobb-Douglas function
- Cobol or COBOL
- Cobordism
- Coboundary
- Cobweb equation
- Cobweb plot
- Cochain
- Cochain complex
- Cochleoid
- Cochloid
- Cochran's theorem
- Coconut
- Cocycle
- Code
- Codeword
- Codimension
- Coding and decoding
- Coding Theory or Coding theory
- Codomain
- Coefficient
- Coefficient of variation
- Coefficients of Laurent series
- Coequalizer
- Coercive form
- Coercive function
- Cofactor
- Cofactor expansion
- Cofibration
- Cofinality
- Cofinite
- Cofinite filter
- Cofinite topology
- Cognitive science or Cognitive Science
- Cograph
- Cohen-Macaulay ring
- Coherent sheaf
- Coherent states
- Cohn's irreducibility criterion
- Cohomological dimension
- Cohomology
- Cohomology class
- Cohomology group
- Cohomology of groups
- Cohomology operation
- Cohomology ring
- Cohomotopy group
- Coil
- Coin
- Coin flipping
- Coin Problem or Coin problem
- Coin tossing
- Coincidence
- Coincident
- Coincident point
- Coincident points
- Colatitude
- Cole Prize
- Colimit
- Colinear
- Collatz conjecture or Collatz Conjecture
- Collatz problem
- Collatz sequence
- Collection
- Collectionwise normal
- Collinear
- Collinear vectors
- Collineation
- Collocation method
- Cologarithm
- Colombian number
- Colon
- Coloring
- Colossally abundant number
- Colouring problem
- Column space
- Column vector
- Comb function
- Combination
- Combination lock
- Combinator
- Combinatorial analysis
- Combinatorial design
- Combinatorial game theory
- Combinatorial geometry
- Combinatorial mathematics
- Combinatorial optimization
- Combinatorial principle
- Combinatorial species
- Combinatorial topology
- Combinatorics
- Combinatory logic or Combinatory Logic
- Combustion theory
- Comma
- Comma category
- Comma Derivative or Comma derivative
- Commensurable
- Common fraction
- Common knowledge
- Common knowledge (logic)
- Common logarithm
- Common residue
- Communication channel
- Commutant
- Commutant lifting theorem
- Commutative
- Commutative Algebra or Commutative algebra
- Commutative Banach algebra
- Commutative diagram
- Commutative group
- Commutative monoid
- Commutative operation
- Commutative ring
- Commutative semigroup
- Commutativity
- Commutator
- Commutator subgroup
- Commute
- Comodule
- Comonad
- Compact
- Compact convergence
- Compact element
- Compact group
- Compact Lie group
- Compact manifold
- Compact operator
- Compact set
- Compact space
- Compact subset
- Compact support
- Compact surface
- Compact-open topology
- Compactification
- Compactification (mathematics)
- Compactly generated space
- Compactly supported
- Compactness
- Compactness theorem
- Companion matrix
- Comparability graph
- Comparison function
- Comparison of topologies
- Comparison test
- Comparison theorem
- Comparison theorem (algebraic geometry)
- Compass
- Compass and straightedge construction
- Compass variation
- Compatible
- Complement
- Complement (set theory)
- Complement graph
- Complement knot
- Complement set
- Complementary angle
- Complementary angles or Complementary Angles
- Complementary error function
- Complementation
- Complemented lattice
- Complete
- Complete algebraic variety
- Complete beta function
- Complete binary tree
- Complete bipartite graph
- Complete category
- Complete Digraph or Complete digraph
- Complete distributivity
- Complete Elliptic Integral or Complete elliptic integral
- Complete elliptic integral of the first kind
- Complete elliptic integral of the second kind
- Complete elliptic integral of the third kind
- Complete gamma function
- Complete graph
- Complete group
- Complete information
- Complete lattice
- Complete measure
- Complete metric
- Complete metric space
- Complete orthogonal system
- Complete quadrangle
- Complete quadrilateral
- Complete set
- Complete space
- Complete topological space
- Completely distributive lattice
- Completely Hausdorff
- Completely metrizable
- Completely metrizable space
- Completely monotonic function
- Completely multiplicative function
- Completely normal
- Completely reducible
- Completely regular space
- Completely-reducible module
- Completely-regular space
- Completeness (in logic)
- Completeness (in topology)
- Completing the square
- Completion
- Completion of a measure space
- Complex
- Complex addition
- Complex analysis
- Complex analytic manifold
- Complex argument
- Complex conjugate
- Complex derivative
- Complex differentiable
- Complex division
- Complex dynamics
- Complex form
- Complex fraction
- Complex function
- Complex geometry
- Complex infinity
- Complex line
- Complex line bundle
- Complex line integral
- Complex logarithm
- Complex Manifold or Complex manifold
- Complex map
- Complex measure
- Complex Modulus
- Complex multiplication
- Complex norm
- Complex number or Complex Number
- Complex Plane or Complex plane
- Complex projective line
- Complex Projective Plane or Complex projective plane
- Complex projective space
- Complex representation
- Complex residue
- Complex sine and cosine
- Complex space
- Complex structure
- Complex System or Complex system
- Complex torus
- Complex variable
- Complex vector
- Complex vector bundle
- Complex vector space
- Complex-valued function
- Complexes
- Complexification
- Complexification of vector space
- Complexity
- Complexity class
- Complexity Theory or Complexity theory
- Component
- Component graph
- Composite field
- Composite Function or Composite function
- Composite number or Composite Number
- Composition
- Composition algebra
- Composition series
- Compositum
- Compound
- Compound interest or Compound Interest
- Compound polyhedron
- Compression
- Computability
- Computable function
- Computable number
- Computation
- Computation time
- Computational Complexity or Computational complexity
- Computational complexity theory
- Computational Geometry or Computational geometry
- Computational irreducibility
- Computational mathematics
- Computational Number Theory or Computational number theory
- Computational reducibility
- Computationally indistinguishable
- Computer algebra
- Computer algebra package
- Comultiplication
- Concatenation
- Concave
- Concave function
- Concave polygon
- Concentric
- Concentric circles
- Concentric spheres
- Concho-spiral
- Conchoid
- Conchoid of de Sluze
- Conchoid of Nicomedes
- Conchospiral
- Conclusion
- Concordance
- Concrete category
- Concrete Math or Concrete math
- Concrete Mathematics or Concrete mathematics
- Concurrency
- Concurrent
- Concyclic
- Condensation
- Condition
- Condition number
- Conditional
- Conditional convergence
- Conditional distribution
- Conditional entropy
- Conditional expectation
- Conditional independence
- Conditional mathematical expectation
- Conditional probability or Conditional Probability
- Conditional proof
- Condom problem
- Condorcet candidate
- Condorcet jury theorem
- Condorcet paradox
- Conductor
- Cone
- Cone (topology)
- Conference matrix
- Confidence Interval or Confidence interval
- Confidence level
- Confidence limits
- Confidence set
- Configuration
- Confluence
- Confluent
- Confluent hypergeometric function
- Confocal
- Conformal connection
- Conformal geometry
- Conformal map
- Conformal mapping
- Conformal projection
- Conformal space
- Conformal structure
- Conformal tensor
- Conformal transformation
- Conformally equivalent
- Congruence
- Congruence (in algebra)
- Congruence arithmetic
- Congruence axioms
- Congruence in geometry
- Congruence of Clausen and von Staudt
- Congruence subgroup
- Congruence transformation
- Congruent
- Congruent matrices
- Congruent number
- Congruum
- Congruum problem
- Conic
- Conic constant
- Conic projection
- Conic section
- Conic sections
- Conical coordinates
- Conical function
- Conical projection
- Conical surface
- Conjecture
- Conjugacy class
- Conjugate
- Conjugate element
- Conjugate elements
- Conjugate gradient algorithm
- Conjugate gradient method
- Conjugate harmonic functions
- Conjugate index
- Conjugate matrix
- Conjugate points
- Conjugate transpose
- Conjugate transpose matrix
- Conjugation
- Conjunct
- Conjunction
- Conjunctive normal form or Conjunctive Normal Form
- Connect-Four or Connect-four
- Connected
- Connected component
- Connected component of the identity
- Connected graph
- Connected set
- Connected set in a topological space
- Connected space
- Connected sum
- Connected surface
- Connected topology
- Connecting homomorphism
- Connection
- Connection form
- Connections on a manifold
- Connective
- Connectivity
- Connex
- Conoid
- Conormal
- Conormal bundle
- Consecutive numbers
- Consequence operator
- Conservative field
- Consistency
- Consistency proof
- Consistency strength
- Consistent
- Consistent estimator
- Constant
- Constant function
- Constant functions and continuity
- Constant map
- Constant of integration
- Constant of proportionality
- Constant polynomial
- Constant random variable
- Constrained optimization problem
- Constructible function
- Constructible Number or Constructible number
- Constructible numbers
- Constructible polygon
- Constructible subset
- Construction
- Construction of Dirac delta function
- Constructive analysis
- Constructive dilemma
- Constructive logic
- Constructive mathematics
- Constructive proof
- Constructive quantum field theory
- Constructive Solid Geometry or Constructive solid geometry
- Contact angle
- Contact manifold
- Contact Number or Contact number
- Contact point
- Contact structure
- Contact transformation
- Contact triangle
- Content
- Contests
- Context-free grammar
- Context-free language
- Context-sensitive grammar
- Context-sensitive language
- Contingency
- Contingency table
- Contingent
- Continuant
- Continued fraction
- Continuity
- Continuity correction
- Continuity equation
- Continuity theorem
- Continuous
- Continuous distribution
- Continuous flow
- Continuous function
- Continuous functional
- Continuous functor
- Continuous group
- Continuous lattice
- Continuous linear mapping
- Continuous map
- Continuous mapping
- Continuous operator
- Continuous relation
- Continuous transformation
- Continuously differentiable function
- Continuum
- Continuum hypothesis or Continuum Hypothesis
- Continuum Theory or Continuum theory
- Contour
- Contour integral
- Contour integration
- Contour line
- Contour winding number
- Contract
- Contractible
- Contractible space
- Contraction
- Contraction of a tensor
- Contraction-mapping principle
- Contradiction
- Contragrediant representation
- Contragredient representation
- Contrapedal curve
- Contrapositive
- Contrast
- Contravariant
- Contravariant functor
- Contravariant vector
- Control function
- Control system
- Control Theory or Control theory
- Controllability
- Convective derivative
- Convergence
- Convergence acceleration
- Convergence improvement
- Convergence in distribution
- Convergence in measure
- Convergence in probability
- Convergence of distributions
- Convergence of measures
- Convergence of random variables
- Convergence tests
- Convergent
- Convergent sequence
- Convergent series
- Converges uniformly
- Converse
- Convex
- Convex analysis
- Convex body
- Convex combination
- Convex cone
- Convex domain
- Convex function or Convex Function
- Convex function (of a complex variable)
- Convex function (of a real variable)
- Convex functional
- Convex Hull or Convex hull
- Convex metric
- Convex optimization theory
- Convex polygon
- Convex polyhedron
- Convex polytope
- Convex programming
- Convex set or Convex Set
- Convex subset
- Convexity
- Convolution
- Convolution (computer science)
- Convolution of functions
- Convolution theorem
- Conway chained arrow notation
- Conway game
- Conway groups
- Conway notation
- Conway Polyhedron Notation or Conway polyhedron notation
- Conway polynomial
- Conway puzzle
- Conway sequence
- Conway's constant
- Conway's Game of Life or Conway's game of life
- Conway's knot
- Conway's knot notation
- Conway's life
- Conway's Soldiers or Conway's soldiers
- Conway-Alexander polynomial
- Cook reduction
- Cooperative game
- Coordinate chart
- Coordinate geometry
- Coordinate plane
- Coordinate ring
- Coordinate system
- Coordinate systems
- Axis
- Coordinates
- Coordination Number or Coordination number
- Copeland-Erdos constant
- Copeland-Erdős constant
- Coplanar
- Copositive matrix
- Coprime
- Coproduct
- Copson-de Bruijn constant
- Copula
- Core of a subgroup
- Corkscrew surface
- Corner detection
- Cornu spiral
- Cornucopia
- Corollary
- Corona
- Correlation
- Correlation (in statistics)
- Correlation coefficient
- Correlation dimension
- Correlation function
- Correlation function in statistical mechanics
- Correlation integral
- Correlation matrix
- Correlation ratio
- Correlogram
- Correspondence
- Cos
- Cosa
- Cosecant
- Coset
- Coset in a group
- Coset space
- Cosh
- Cosine
- Cosine integral
- Cosine theorem
- Cosines law
- Cosmogony
- Cosmological constant or Cosmological Constant
- Cosmology
- Costa minimal surface
- Costas array
- Cot
- Cotangent
- Cotangent bundle
- Cotes formulas
- Coth
- Cotlar's lemma
- Cotlar-Knapp-Stein lemma
- Cotorsion group
- Counit
- Count
- Countable additivity probability axiom
- Countable compactness
- Countable complement topology
- Countable set
- Countable space
- Countably compact
- Countably compact space
- Countably infinite
- Countably-additive set function
- Countably-compact space
- Countably-normed space
- Counter machine
- Counter points
- Counterexample
- Counting measure
- Counting number
- Counting problem
- Courant number
- Courant-Friedrich-Lévy Condition or Courant-Friedrich-Lévy condition
- Courant-Friedrichs-Lewy condition
- Cousin primes
- Cousin problems
- Covariance
- Covariance matrix
- Covariant
- Covariant derivative
- Covariant differential
- Covariant differentiation
- Covariant functor
- Covariant vector
- Cover
- Covering
- Covering (graph theory)
- Covering dimension
- Covering homotopy
- Covering map
- Covering space
- Covering system
- Coversine
- Cox's theorem
- Coxeter diagram
- Coxeter element
- Coxeter graph
- Coxeter group
- Coxeter matrix
- Coxeter-Dynkin diagram
- CPCTC
- CR submanifold or Cr submanifold
- Cr-structure
- Crafoord Prize
- Cramer rule
- Cramer's rule or Cramer's Rule
- Cramér conjecture
- Cramér-Granville conjecture
- Cramér-Wold theorem
- Crank-Nicolson method
- Craps
- Crazy dice
- CRC or Crc
- Creation operators
- Creative set
- Cremona group
- Cremona transformation
- Cribbage
- Criterion
- Critical damping
- Critical Level or Critical level
- Critical Line or Critical line
- Critical pair
- Critical point
- Critical region
- Critical strip
- Critical value
- Crofton formula
- Crofton's formula
- Crook
- Cross
- Cross of Lorraine or Cross of lorraine
- Cross polytope
- Cross product or Cross Product
- Cross ratio or Cross Ratio
- Cross Section or Cross section
- Cross Sum or Cross sum
- Cross-cap
- Cross-correlation
- Cross-correlation coefficient
- Cross-Ratio or Cross-ratio
- Crossed Ladders Problem
- Crossed module
- Crossed modules
- Crossing lemma
- Crossing number
- Crosssum
- Crowd
- Crown
- Cruciform
- Crumb
- Crunode
- Cryptanalysis
- Cryptarithm
- Cryptarithmetic
- Cryptographic hash function
- Cryptography
- Cryptology
- Crystalline cohomology
- Crystallographic group
- Crystallographic point groups
- Crystallography restriction
- Cs
- Csc
- Csch
- Császár polyhedron
- Cuban prime
- Cubature
- Cube
- Cube duplication
- Cube root or Cube Root
- Cubic
- Cubic curve
- Cubic equation or Cubic Equation
- Cubic form
- Cubic formula
- Cubic graph
- Cubic group
- Cubic lattice
- Cubic number
- Cubic polynomial
- Cubic spline
- Cubic surface
- Cubical equation
- Cubical graph
- Cubitruncated cuboctahedron
- Cuboctahedron
- Cubohemioctahedron
- Cuboid
- Cuisenaire rods
- Cullen number
- Cullen prime
- Cumulant
- Cumulant generating function
- Cumulant-generating function
- Cumulation
- Cumulative distribution function or Cumulative Distribution Function
- Cumulative frequency
- Cumulative hierarchy
- Cunningham chain
- Cunningham project
- Cuntz algebra
- Cup
- Cup product
- Cupola
- CurlCurl or CURL
- Curly brace
- Current
- Current (mathematics)
- Current density
- Currying
- Curse of dimension
- Curtate cycloid
- Curvature
- Curvature (plane curve)
- Curvature (space curve)
- Curvature form
- Curvature tensor
- Curvature transformation
- Curvature vector
- Curve
- Curve fitting
- Curve length
- Curve of Agnesi
- Curve of constant breadth
- Curve of constant width
- Curve of pursuit
- Curve orientation
- Curvilinear coordinates
- Cushion
- Cusp
- Cusp form
- Cuspidal representation
- Cut
- Cut (graph theory)
- Cut Elimination Theorem or Cut elimination theorem
- Cut set
- Cut vertex
- Cut-point
- Cut-vertex
- Cutting
- Cutting problem
- Cutvertex
- CW-Complex or Cw-complex or CW-complex
- Cybernetics
- Cycle
- Cycle (mathematics)
- Cycle decomposition
- Cycle graph
- Cycle index
- Cycle notation
- Cyclic code
- Cyclic extension
- Cyclic graph
- Cyclic group
- Cyclic module
- Cyclic number or Cyclic Number
- Cyclic permutation
- Cyclic polygon
- Cyclic quadrilateral
- Cyclic Redundancy Check or Cyclic redundancy check
- Cycloid
- Cyclomatic Number
- Cyclometric functions
- Cyclotomic
- Cyclotomic AKS test
- Cyclotomic extension
- Cyclotomic field
- Cyclotomic polynomial
- Cyclotomic polynomials
- Cyclotomy
- Cylinder
- Cylinder coordinates
- Cylinder set
- Cylindrical
- Cylindrical algebraic decomposition
- Cylindrical coordinates
- Cylindrical measure
- Cylindrical projection
- Cylindroid
