Zarankiewicz's Conjecture
The Crossing Number for a Complete Bigraph is
where
is the Floor Function. This has been shown to be true for all 
. Zarankiewicz has shownthat, in general, the Formula provides an upper bound to the actual number.See also Complete Bigraph, Crossing Number (Graph)- Fisher's Theorem
- Fisher's z-Distribution
- Fisher's z'-Transformation
- Fisher-Tippett Distribution
- Fitting Subgroup
- Five Cubes
- Five Disks Problem
- Five Tetrahedra Compound
- Fixed
- Fixed Element
- Fixed Point
- Fixed Point (Differential Equations)
- Fixed Point (Map)
- Fixed Point Theorem
- Fixed Point (Transformation)
- Flag
- Flag Manifold
- Flat
- Flat Norm
- Flat Space Theorem
- Flat Surface
- Flattening
- Flemish Knot
- Fletcher Point
- Flexagon