The Arthur-Selberg trace formula is an equality between two kinds of traces; the geometric terms given by the conjugacy classes of a group and the spectral terms given by the induced representations. In general, these terms require a truncation in order to converge, which leads to an equality of truncated kernels. The formulas are difficult in general and even the case of GL(2)...(展开全部)

我们心中的英雄是--Richard Feynman

我们心中的英雄是--Richard Feynman

Surfaces are among the most common and easily visualized mathematical objects, and their study brings into focus fundamental ideas, concepts, and methods from geometry, topology, complex analysis, Morse theory, and group theory. At the same time, many of those notions appear in a technically simpler and more graphic form than in their general “natural” settings. The first, prim...(展开全部)

For two decades, first at Wellesley and then at Cornell, Nabokov introduced undergraduates to the delights of great fiction. Here, collected for the first time, are his famous lectures, which include Mansfield Park, Bleak House, and Ulysses. Edited and with a Foreword by Fredson Bowers; Introduction by John Updike; illustrations.