Dirichlet's theorem

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
• Dirichlet's test for convergence

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