Re: [isabelle-dev] Future of Nat_Transfer
I have never understood it and generally feel terror at the sight of any transfer operation. So I would be happy to get rid of it. Larry > On 19 Oct 2017, at 12:56, Florian Haftmann > wrote: > > My suggestion would be to remove it completely. > > Any opinions on that? ___ isabelle-dev mailing list isabelle-...@in.tum.de https://mailmanbroy.informatik.tu-muenchen.de/mailman/listinfo/isabelle-dev
[isabelle-dev] Future of Nat_Transfer
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 signature.asc Description: OpenPGP digital signature ___ isabelle-dev mailing list isabelle-...@in.tum.de https://mailmanbroy.informatik.tu-muenchen.de/mailman/listinfo/isabelle-dev
