Jb. An et M. Conder, ON THE NUMBERS OF 2-WEIGHTS, UNIPOTENT CONJUGACY CLASSES, AND IRREDUCIBLE BRAUER 2-CHARACTERS OF FINITE CLASSICAL-GROUPS, Proceedings of the American Mathematical Society, 123(8), 1995, pp. 2297-2304
A closed expression for the number of unipotent conjugacy classes of a
classical group G is given and Alperin's weight conjecture is confirm
ed for G globally and for a symplectic or odd-dimensional orthogonal g
roup block by block.