Instructions: The paper is written in AMSTEX 1.1. Due to know problems in the transmission of special characters you have to redo the following substitutions. The BACKSLASH is represented by the combination !BSL! The LEFT BRACE is represented by the combination !LBR! The RIGHT BRACE is represented by the combination !RBR! You have to resubstitute them again before you tex this file. For certain problematic characters the Tex-keywords have been used. Below you find some other special characters, which have not caused any problem up to now: THIS IS A RIGHT PARAN( THIS IS A LEFT PARAN) THIS IS A RIGHT QUOTE' THIS IS A AT@ THIS IS A DOLLAR$ THIS IS A AMPERCENT% THIS IS A COMM ADD& THIS IS A NUMBER SIGN# THIS IS A DOUBLE-QUOTE" % % % BODY