Brahmagupta's Problem
Solve the Pell Equation
in Integers. The smallest solution is
, 
.See also Diophantine Equation, Pell Equation- Schwarz-Pick Lemma
- Schwarz Reflection Principle
- Schwarz's Inequality
- Schwarz's Triangle Problem
- Schwarz Triangle
- Schwenk's Formula
- Schönflies Symbol
- Schönflies Theorem
- Scientific Notation
- s-Cluster
- Score Sequence
- Screw
- Screw Theorem
- Scruple
- Sea Horse Valley
- Searching
- Search Tree
- Seashell
- Secant
- Secant Line
- Secant Method
- Secant Number
- Sech
- Second
- Second Curvature