- Fisher's matrix of information
- fishing problem
- fitness
- Fitting class
- Fitting group
- fitting of utility curve
- Fitting subgroup
- five centroids of a triangle
- five-color theorem
- five lemma (module theory)
- fixed asset accumulation coefficient
- fixed block
- fixed boundary variational problem
- fixed cones of instantaneous axis
- fixed degree for fuzzy mapping
- fixed effect
- fixed field of a group
- fixed-length code
- fixed line of transformation
- fixed mean pole
- fixed mode
- fixed mode of large-scale system
- fixed plane of space transformation
- fixed point
- fixed point