Formulas
- Folkman graph
- Fontaine's period rings
- Fontaine–Mazur conjecture
- Ford circle
- Forgetful functor
- Formal derivative
- Formal group law
- Formal language
- Continuous or discrete variable
- Continuous wavelet transform
- Formal methods
- Formal scheme
- Continuum hypothesis
- Formally real field
- Formation (group theory)