Anosov Automorphism
A Hyperbolic linear map 
with Integer entries in the transformationMatrix and Determinant 
is an Anosov Diffeomorphism of the 
-Torus, called anAnosov automorphism (or Hyperbolic Automorphism). Here, the term automorphism is used in the Group Theory sense.
- Round
- Rounding
- Routh-Hurwitz Theorem
- Routh's Theorem
- RSA Encryption
- RSA Number
- Rubber-Sheet Geometry
- Rubik's Clock
- Rubik's Cube
- Rudin-Shapiro Sequence
- Rudvalis Group
- Rule
- Ruled Surface
- Rule of 72
- Ruler
- Ruler Function
- Ruling
- Run
- Runge-Kutta Method
- Runge-Walsh Theorem
- Running Knot
- Russell's Antinomy
- Russell's Paradox
- Russian Multiplication
- Russian Roulette