Dear all, the nowadays ancient theory Nat_Transfer (essentially providing an attribute to transfer ad-hoc between theorems on nat vs. int) is almost obsolete:
* »almost« since I haven't figured out how relevant it is still for HOL-Number_Theory * Conversion between nat and int is rarely needed since most common lemmas are provided by type classes anyway nowadays. See also http://isabelle.in.tum.de/repos/isabelle/file/ee874941dfb8/src/HOL/Nat_Transfer.thy for the current state of affairs. My suggestion would be to remove it completely. Any opinions on that? Cheers, Florian -- PGP available: http://isabelle.in.tum.de/~haftmann/pgp/florian_haftmann_at_informatik_tu_muenchen_de
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