induction rules for trancl/rtrancl expressed using subsets
induction rules for trancl/rtrancl expressed using subsets

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle