Formulas
- Quotient (universal algebra)
- Quotient by an equivalence relation
- Quotient category
- Quotient of a formal language
- Quotient of an abelian category
- Reduced derivative
- Stable map
- Radial function
- Radical polynomial
- Stieltjes transformation
- Rado graph
- Ordered exponential
- Paranormal subgroup
- Stopped process
- Tensor product of quadratic forms