Sylvester's Determinant Identity
where
is the submatrix of 
formed by the intersection of the subset 
of columns and 
of rows.- Symplectic Manifold
- Symplectic Map
- Symplectomorphism
- Synclastic
- Synergetics
- Synthesized Beam
- Syntonic Comma
- Syracuse Algorithm
- Syracuse Problem
- System of Differential Equations
- System of Equations
- Syzygies Problem
- Syzygy
- Szilassi Polyhedron
- Szpiro's Conjecture
- Sárközy's Theorem
- T2-Separation Axiom
- Tableau
- Tabu Search
- Tacnode
- Tacpoint
- Tactix
- Tail Probability
- Tait Coloring
- Tait Cycle