Formulas
- Tournament (graph theory)
- Trace (linear algebra)
- Tractrix
- Transformation between distributions in time–frequency analysis
- Transition radiation
- Transpose
- Transverse mode
- Treap
- Tree (graph theory)
- Tree decomposition
- Treewidth
- Trial division
- Triangular bipyramid
- Triangular cupola
- Triangular decomposition