Hurwitz's theorem

Hurwitz's theorem can refer to several theorems named after Adolf Hurwitz:

• Hurwitz's theorem (complex analysis)
• Riemann–Hurwitz formula in algebraic geometry
• Hurwitz's theorem (composition algebras) on quadratic forms and nonassociative algebras
• Hurwitz's automorphisms theorem on Riemann surfaces
• Hurwitz's theorem (number theory)