Formulas
- E8 lattice
- E8 manifold
- EHP spectral sequence
- Eamonn O'Brien (mathematician)
- Earle–Hamilton fixed-point theorem
- Incidence algebra
- Incidence geometry
- Incidence matrix
- Inclusion (logic)
- Inclusion map
- Inclusion order
- Incomplete Fermi–Dirac integral
- Incomplete polylogarithm
- Incompressibility method
- Incompressible surface