- free automorphism
- free band
- free basis
- free bivector
- free Boolean algebra
- free boundary
- free boundary flow
- free boundary problem
- free boundary-value problem
- free calculus
- free code
- free commutative ring
- free composition
- free decomposition
- free derivative
- free differential calculus
- free distance
- Freedman, M.H.
- Freedman theorem
- free element
- free embedding
- free endpoint
- free endpoint variational problem
- free energy
- free entropy