Rodrigues's Curvature Formula
where
is the unit Normal Vector and 
is one of the two Principal Curvatures.See also Normal Vector, Principal Curvatures- Chebyshev Function
- Chebyshev-Gauss Quadrature
- Chebyshev Inequality
- Chebyshev Integral
- Chebyshev Integral Inequality
- Chebyshev Phenomenon
- Chebyshev Polynomial of the First Kind
- Chebyshev Polynomial of the Second Kind
- Chebyshev Quadrature
- Chebyshev-Radau Quadrature
- Chebyshev's Theorem
- Chebyshev Sum Inequality
- Chebyshev-Sylvester Constant
- Checkerboard
- Checker-Jumping Problem
- Checkers
- Checksum
- Cheeger's Finiteness Theorem
- Chefalo Knot
- Chen's Theorem
- Chern Class
- Chern Number
- Chernoff Face
- Chess
- Chessboard