Rodrigues's Curvature Formula
where
is the unit Normal Vector and 
is one of the two Principal Curvatures.See also Normal Vector, Principal Curvatures- Constructive Dilemma
- Contact Angle
- Contact Number
- Contact Triangle
- Content
- Contiguous Function
- Continued Fraction
- Continued Fraction Constant
- Continued Fraction Factorization Algorithm
- Continued Fraction Fundamental Recurrence Relation
- Continued Fraction Map
- Continued Fraction Unit Fraction Algorithm
- Continued Square Root
- Continued Vector Product
- Continuity
- Continuity Axioms
- Continuity Correction
- Continuity Principle
- Continuous
- Continuous Distribution
- Continuous Function
- Continuous Space
- Continuum
- Continuum Hypothesis
- Contour