On Humphreys "parameterization of blocks" conjecture
Ami Braun (U. Haifa, Israel)
Wednesday 31st May, 2017 16:00-17:00 Maths 331B
Let G be a connected ,semi-simple, simply connected algebraic group over a field of prime characteristic p, and g=Lie(G) its Lie algebra. The above 1998 conjecture about blocks of the enveloping algebra U(g) of g ,was settled ,in case p is" very good" for G ,by K.Brown and I.Gordon in 2001.We shall indicate how the case of p being merely" good" is handled. In particular we shall describe the new results about the centre of U(g) which are crucial in the proof.