Iwahori 1964 / Hecke earlier. Deformation of group-algebra of Weyl-group. Type-A: H_n(q) = quotient of braid-group-algebra. Foundation of Kazhdan-Lusztig theory + categorification.
Iwahori 1964 / Hecke earlier. Deformation of group-algebra of Weyl-group. Type-A: H_n(q) = quotient of braid-group-algebra. Foundation of Kazhdan-Lusztig theory + categorification.