ばいちょ(売価調査)、価格比較とネットでのお買い物を楽に

内容説明 Global class field theory is a major achievement of algebraic number theory based on the functorial properties of the reciprocity map and the existence theorem. This book explores the consequences and the practical use of these results in detailed studies and illustrations of classical subjects. In the corrected second printing 2005， the author improves many details all through the book.