There exist several classification theorems in mathematics:

• Classification theorem of surfaces
  • Classification of two-dimensional closed manifolds
  • Enriques-Kodaira classification of algebraic surfaces (complex dimension two, real dimension four)
  • Nielsen-Thurston classification which characterizes homeomorphisms of a compact surface
• Classification of finite simple groups
• Artin–Wedderburn theorem — a classification theorem for semisimple rings

Mathematical disambiguation