Formulas
- Rational root theorem
- Rayleigh number
- Rayleigh–Jeans law
- Reaction rate
- Rectification (geometry)
- Regular language
- Regularization (physics)
- Relaxation (physics)
- Remez algorithm
- Removable singularity
- Rename (relational algebra)
- Resolvent (Galois theory)
- Restricted Boltzmann machine
- Reversible hydrogen electrode
- Szemerédi regularity lemma