Similar to オイラー＝ラグランジュ方程式

Aitken's delta-squared process

Aho–Corasick algorithm

Levi-Civita symbol

Edmonds–Karp algorithm

Hénon map

Sieve of Eratosthenes

ElGamal encryption

Erdős–Mordell inequality

Erdős–Straus conjecture

Erdős–Borwein constant

Herbrandization

Herbrand's theorem

Hermitian matrix

Sesquilinear form#Hermitian form

Self-adjoint operator

Hermitian manifold

Anabelian geometry

Enneper surface

Poncelet point

Theta operator

Ore's theorem

Oka's lemma

Oka coherence theorem

Osgood's lemma

Ostrowski's theorem

Ornstein–Uhlenbeck process