Journal overview: This electronic-only journal was published by the American Mathematical Society from 1995 to 2007 and is currently published by the American Institute of Mathematical Sciences as Electronic Research Announcements in Mathematical Sciences.  As published by the AMS, a research announcement was designed to communicate its contents to a broad mathematical audience.  

Copying and reprinting: Material in this journal published by the AMS (Volumes 1--13) may be reproduced by any means for educational and scientific purposes without fee or permission with the exception of reproduction by services that collect fees for delivery of documents and provided that the customary acknowledgment of the source is given. This consent does not extend to other kinds of copying for general distribution, for advertising or promotional purposes, or for resale. Requests for permission for commercial use of material published by the AMS should be addressed to the Acquisitions Department, American Mathematical Society, 201 Charles Street, Providence, RI 02904-2294 USA. Requests can also be made by email to reprint-permission@ams.org .

Excluded from these provisions is material in articles for which the author holds copyright. In such cases, requests for permission to use or reprint should be addressed directly to the author(s). Copyright ownership is indicated in the notice in the lower right-hand corner of the first page of each article.

Indexing and archiving notes: This journal as published by the AMS is indexed in Mathematical Reviews®, Zentralblatt MATH, Science Citation Index--ExpandedT, ISI Alerting Services, CompuMath Citation Index®, and Current Contents®, Physical, Chemical & Earth Sciences.  This journal as published by the AMS is archived in Portico.