Behavioral and Coinductive Rewriting (invited talk)11The research reported in this paper has been supported in part by National Science Foundation grant CCR-9901002, and by the CafeOBJ project of the Information Promotion Agency (IPA), Japan, as part of its Advanced Software Technology Program.Note: all papers by the authors can be found on their websites, which respectively have the URLs http://www.ucsd.edu/users/{goguen, klin, grosu}. More information on the BOBJ system can be found at http://www.ucsd.edu/groups/tatami/bobj/.Note: all papers by the authors can be found on their websites, which respectively have the URLs www.ucsd.edu/users/{goguen, klin, grosu}. More information on the BOBJ system can be found at www.ucsd.edu/groups/tatami/bobj/.