Fri, 31 Oct 1997 15:15:06 +0100 added str_of_sg: sg -> string;
wenzelm [Fri, 31 Oct 1997 15:15:06 +0100] rev 4051
added str_of_sg: sg -> string; improved error handling of data access;
Thu, 30 Oct 1997 17:05:20 +0100 added mixfix_args;
wenzelm [Thu, 30 Oct 1997 17:05:20 +0100] rev 4050
added mixfix_args;
Thu, 30 Oct 1997 17:04:54 +0100 tuned thy_data;
wenzelm [Thu, 30 Oct 1997 17:04:54 +0100] rev 4049
tuned thy_data;
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