Birkhoff's Theorem


 * Theorems named for the American mathematician :
 * Birkhoff's Theorem (Relativity)
 * Birkhoff's Theorem (Electromagnetism)
 * Birkhoff's Ergodic Theorem


 * Theorems named for his son, :
 * Birkhoff's HSP Theorem, concerning the closure operations of homomorphism, subalgebra and product
 * Birkhoff's Representation Theorem for distributive lattices