01082nam--2200349---45--9900004088702033163-540-67397-00040887USA010040887(ALEPH)000040887USA01004088720010420d2000----km-y0ITAy0103-------baENGDEQuilts: central extensions, briad actions, and finite groupsTim HsuBerlinSpringer-Verlagcopyr. 2000XII, 182 p.20 cmill.Lecture notes in mathematics17312001Lecture notes in mathematics1731Teoria dei gruppi512.2Hsu,Tim62626ITACBSISBD990000408870203316510 LNM (1731)0026233 CBS51000104594BKSCIALANDI9020010420USA01113320020403USA011649PATRY9020040406USA011628Quilts: central extensions, briad actions, and finite groups874873UNISA