Re: [sage-devel] Re: ring creation involved in coercion

2016-01-21 Thread Daniel Krenn
On 2016-01-21 02:35, William Stein wrote: > On Wed, Jan 20, 2016 at 2:02 PM, Vincent Delecroix > <20100.delecr...@gmail.com> wrote: > For completeness (when somebody finds this via a search) if you follow > the trac ticket, you'll see the nice simple code Vincent just wrote: > > def _pushout_(

Re: [sage-devel] Re: ring creation involved in coercion

2016-01-20 Thread William Stein
On Wed, Jan 20, 2016 at 6:07 PM, Vincent Delecroix <20100.delecr...@gmail.com> wrote: > >> Indeed, that is very nice, and it's hard to imagine something simpler. >> Great job people who designed this (Robert Bradshaw et al.)! > > > For completeness, this feature with _pushout_ method was introduced

Re: [sage-devel] Re: ring creation involved in coercion

2016-01-20 Thread Vincent Delecroix
On 20/01/16 22:35, William Stein wrote: On Wed, Jan 20, 2016 at 2:02 PM, Vincent Delecroix <20100.delecr...@gmail.com> wrote: Sorry... I found out! We can implement a _pushout_ in the parent. Very simple. Sorry for the noise. For completeness (when somebody finds this via a search) if you foll

Re: [sage-devel] Re: ring creation involved in coercion

2016-01-20 Thread William Stein
On Wed, Jan 20, 2016 at 2:02 PM, Vincent Delecroix <20100.delecr...@gmail.com> wrote: > Sorry... I found out! We can implement a _pushout_ in the parent. Very > simple. Sorry for the noise. For completeness (when somebody finds this via a search) if you follow the trac ticket, you'll see the nice