What about adding it to the ab_group_add typeclass? I know this is not the usual mathematical syntax for permutations, but at least we can reuse a lot of theorems from this type class.
- Johannes Am Dienstag, den 05.07.2016, 19:40 +0200 schrieb Florian Haftmann: > > > > One question: why did you only set it up for monoid_mult and > > inverse, > > and not as a ab_group_mult? > The answer is simple: there is no type class > ab_group_mult. Why? Since > our multiplicative structures are tailored towards rings where 0 is > no > part of the multiplicative group. > > Cheers, > Florian > _______________________________________________ isabelle-dev mailing list isabelle-...@in.tum.de https://mailmanbroy.informatik.tu-muenchen.de/mailman/listinfo/isabelle-dev
