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.
- Complete Residue System
- Complete Sequence
- Complete Space
- Completing the Square
- Complex
- Complex Analysis
- Complex Conjugate
- Complex Derivative
- Complex Differentiable
- Complex Function
- Complexity (Number)
- Complexity (Sequence)
- Complexity Theory
- Complex Matrix
- Complex Multiplication
- Complex Number
- Complex Plane
- Complex Projective Plane
- Complex Representation
- Complex Structure
- Component
- Composite Knot
- Compositeness Certificate
- Compositeness Test
- Composite Number