Times
The operation of Multiplication, i.e., 
times 
. Various notations are 
, 
, 
, and
. The ``multiplication sign'' 
is based on Saint Andrew's Cross (Bergamini 1969). Floating pointMultiplication is sometimes denoted 
.
References
Bergamini, D. Mathematics. New York: Time-Life Books, p. 11, 1969.
- r(n)
- Robbin Constant
- Robbins Algebra
- Robbins Equation
- Robbin's Inequality
- Robertson Condition
- Robertson Conjecture
- Robertson-Seymour Theorem
- Robin Boundary Conditions
- Robin's Constant
- Robinson Projection
- Robust Estimation
- Rodrigues Formula
- Rodrigues's Curvature Formula
- Rogers-Ramanujan Continued Fraction
- Rogers-Ramanujan Identities
- Rolle's Theorem
- Roman Coefficient
- Roman Factorial
- Roman Numeral
- Roman Surface
- Roman Symbol
- Romberg Integration
- Rook Number
- Rook Reciprocity Theorem