# Dirichlet's theorem

(Redirected from Dirichlet's theorem (disambiguation))

**Dirichlet's theorem** may refer to any of several mathematical theorems due to Peter Gustav Lejeune Dirichlet.

- Dirichlet's theorem on arithmetic progressions
- Dirichlet's approximation theorem
- Dirichlet's unit theorem
- Dirichlet conditions
- Dirichlet boundary condition
- Dirichlet's principle
- Pigeonhole principle, sometimes also called Dirichlet's principle

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