Fri, 26 Jan 1996 20:25:39 +0100 Streamlined defs in Relation and added new intro/elim rules to do with
nipkow [Fri, 26 Jan 1996 20:25:39 +0100] rev 1454
Streamlined defs in Relation and added new intro/elim rules to do with pattern matching in sets: {(x,y). ...} and UN (x,y):A. ...
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