Rank
The ``rank'' of a mathematical object is defined whenever that object is Free. In general, the rank of a Freeobject is the Cardinality of the Free generating Subset 
. The word ``rank'' also refers to severalunrelated concepts in mathematics involving groups, quadratic forms, sequences, statistics, and tensors.
- Total Intersection Theorem
- Total Order
- Total Space
- Totative
- Totient Function
- Totient Function Constants
- Totient Valence Function
- Touchard's Congruence
- Tour
- Tournament
- Tournament Matrix
- Tower of Power
- Towers of Hanoi
- T-Polyomino
- T-Puzzle
- Trace (Complex)
- Trace (Group)
- Trace (Map)
- Trace (Matrix)
- Trace (Tensor)
- Tractory
- Tractrix
- Tractrix Evolute
- Tractrix Radial Curve
- Tractroid