Am Freitag, 18. Dezember 2015 09:39:57 UTC+1 schrieb Dima Pasechnik: > > > > On Friday, 18 December 2015 08:33:05 UTC, Martin R wrote: >> >> Actually, I propose to delete all code from sage, because it doesn't work >> in all circumstances. >> >> It might be useful for some people (not all that many), but we are >> actually doing them a favour because we save them from using software in >> circumstances where it doesn't apply. Thus, by deleting sage, we will >> contribute to their happiness. >> >> Moreover, we are going to save a lot of disk space and cpu time, that >> will then find much better use! >> >> Martin >> >> PS: more seriously: if you don't know what to_permutation does, why would >> you use it? >> > WTF? Permutation on a set is a just a bijection, isn't it? > And whoever coded and reviewed this crap cannot even tell 0 from a > negative number, you know: > > sage: s=SetPartition([[0,1,2],[3,4]]) > sage: s.to_permutation() > --------------------------------------------------------------------------- > ValueError Traceback (most recent call > last) > ... > ValueError: All elements should be strictly positive integers, and I just > found a negative one. > > > Indeed, as I said, we should get rid of the Permutation class, because it is buggy.
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