Brahmagupta's Problem
Solve the Pell Equation
in Integers. The smallest solution is
, 
.See also Diophantine Equation, Pell Equation- z-Transform (Population)
- Embeddable Knot
- Embedding
- Empty Set
- e-Multiperfect Number
- Enantiomer
- Enantiomorph
- Encoding
- Endogenous Variable
- Endomorphism
- Endraß Octic
- Energy
- En-Function
- Engel's Theorem
- Enneacontagon
- Enneacontahedron
- Enneadecagon
- Enneagon
- Enneagonal Number
- Enneakaidecagon
- Enneper's Minimal Surface
- Enneper's Negative Curvature Surfaces
- Enneper-Weierstraß Parameterization
- Enormous Theorem
- Enriques Surfaces