，平均（值）；中项- forward derivative
- forward derivative function
- forward difference
- forward difference operator
- forward difference quotient
- forward differentiability
- forward Dini derivative
- forward elimination
- forward elimination and backward substitution
- forward equation
- forward error
- forward error analysis
- forward error-correcting
- forward Euler method
- forward interpolation
- forward interpolation formula
- forward operator
- forward sweep
- forward type
- forward type cycle
- Foster, S.
- foundation
- foundations of analysis
- foundations of geometry
- foundations of mathematics