Nominal/Ex/LetRec2.thy
2011-09-21 Christian Urban deleted PNil
2011-07-05 Christian Urban changed bind to binds in specifications; bind will cause trouble with Monad_Syntax
2010-11-13 Christian Urban respectfulness for permute_bn functions
2010-08-29 Christian Urban renamed NewParser to Nominal2
2010-08-26 Christian Urban corrected bug with fv-function generation (that was the problem with recursive binders)
2010-08-25 Christian Urban cleaned up (almost completely) the examples
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