- field of formal power series
- field of fractions
- field of lines
- field of points
- field of rational fractions
- field of rational numbers
- field of real numbers
- field of sets
- field of sets
- field of sets
- field of stationary curve
- field polynomial
- field without source
- figurate number
- figurate number
- figure
- figure in the bundle
- figure of semicircle
- figures of mirror similar
- figures of syllogism
- figures symmetric with respect to a straight line
- figure symmetric with respect to a straight line
- file
- file management
- Filippov theory