Saint Andrew's Cross
A Greek Cross rotated by 45°, also called the crux decussata. The Multiplication Sign 
is based onSaint Andrew's cross (Bergamini 1969).
References
Bergamini, D. Mathematics. New York: Time-Life Books, p. 11, 1969.
- Chain Fraction
- Chain (Graph)
- Chain Rule
- Chair
- Chaitin's Constant
- Chaitin's Number
- Chaitin's Omega
- Champernowne Constant
- Change of Variables Theorem
- Chaos
- Chaos Game
- Character (Group)
- Characteristic Class
- Characteristic (Elliptic Integral)
- Characteristic Equation
- Characteristic (Euler)
- Characteristic Factor
- Characteristic (Field)
- Characteristic Function
- Squareful
- Square Gyrobicupola
- Square Integrable
- Square Knot
- Square Matrix
- Square Number