Vladimir Dobrushkin
https://math.uri.edu/

Version 1.00 (Created: 2018-01-29T15:10:58-05:00; Technical Refresh: N/A)

Copyright ©2018

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the appendix entitled GNU Free Documentation License.

Preface
Main web cite