【预订】A Theory of Generalized Donaldson-Thomas Invariants 9780 美国库房发货，通常付款后3-5周到货！
Product Details 基本信息 ISBN-13 书号 9780821852798 Author 作者 Dominic Joyce Format 版本 平装-胶订 Pages Number 页数 199页 Publisher 出版社 American Mathematical Society (AMS) Publication Date 出版日期 2012-03-30 Language 语种 英语 Book Contents 内容简介 This book studies generalized Donaldson-Thomas invariants \(\bar{DT}{}^\alpha(\tau)\). They are rational numbers which `count’ both \(\tau\)-stable and \(\tau\)-semistable coherent sheaves with Chern character \(\alpha\) on \(X\); strictly \(\tau\)-semistable sheaves must be counted with complicated rational weights. The \(\bar{DT}{}^\alpha(\tau)\) are defined for all classes \(\alpha\), and are equal to \(DT^\alpha(\tau)\) when it is defined. They are unchanged under deformations of \(X\), and transform by a wall-crossing formula under change of stability condition \(\tau\). To prove all this, the authors study the local structure of the
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