- Reidemeister-Franz torsion
- Reidemeister, K.W.F.
- Reidemeister move
- Reidemeister theorem
- Reidemeister torsion
- re-indexing
- Reiner, I.
- reinforced
- reinforcement
- Reinhardt domain
- Reinhardt, K.
- Reinhold, E.
- reinsurance
- reinversion
- Reiten, I.
- reiteration theorem
- rejection
- rejection boundary
- rejection line
- rejection number
- rejection probability
- rejection region
- rejection sampling technique
- rejection threshold
- rejection zone