Formulas
- Residual property (mathematics)
- Residually finite group
- Residue (complex analysis)
- Linear form
- Resolution (algebra)
- Restriction (mathematics)
- Retraction (topology)
- Linear recurrence with constant coefficients
- Rho
- Ribbon knot
- Riemannian connection on a surface
- Link group
- Liouville's formula
- Liouville's theorem (conformal mappings)
- Littlewood–Richardson rule