Category
page 1Theorems in representation theory
Schur's lemma
lemma stating that a module homomorphism between two simple modules over the same ring is either an isomorphism or identically zero
Maschke's theorem
theorem that a representation of a finite group over a field with characteristic not dividing the order of the group decomposes as a direct sum of irreducible representations
Engel's theorem
theorem in Lie representation theory
Wigner–Eckart theorem
theorem
Peter–Weyl theorem
theorem