journal.pdf
2016-01-06 Christian Urban renamed files
2015-10-04 Christian Urban added one more reference to an incorrect specification
2015-09-09 Christian Urban updated for Isabelle 2015
2014-07-15 Christian Urban updated teh theories to newer Isabelle version
2014-06-12 Christian Urban a few additions
2014-06-09 Christian Urban added another book that makes the error, some more proofs
2014-06-02 Christian Urban updated
2014-05-30 Christian Urban finished proof of acyclity
2014-05-22 Christian Urban added a bit more text to the paper and separated a theory about Max
2014-05-15 Christian Urban simplified the cp_rec proof
2014-05-06 Christian Urban made some modifications.
2014-03-04 Christian Urban updated
2014-03-04 Christian Urban cleaned up
2014-03-04 Christian Urban updated
2014-03-04 Christian Urban added two more references
2014-03-04 Christian Urban some additions
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