- force of crack growth
- force of morbidity
- force of mortality
- force screw
- force system in equilibrium
- forcing condition
- forcing language
- forcing method
- forcing method
- forcing relation
- forcing theorem
- forest
- forgetful functional
- forgetful functor
- forgetful functor
- formal adjoint equation
- formal character
- formal character
- formal deduction
- formal deductive system
- formal grammar
- formal grammar
- formalist school
- formal language
- formal language