Nilpotent orbits and finite W-algebras, in Geometric Representation Theory and Extended Affine Lie Algebras, Fields Institute Communications 59 (Eds. E. Neher, A. Savage, W. Wang). AMS, Providence, RI; 2011. See also: Papers Published NOTES 71-105. arxiv:0912.0689 Last updated on 01/21/2021