Re: [sage-devel] A tutorial worksheet on coercion and categories

2011-06-15 Thread William Stein
On Sat, Jun 11, 2011 at 12:19 PM, Simon King wrote: > Hi!, > > At http://www.sagenb.org/home/pub/2813, I have published a worksheet > that aims at explaining how one can implement a new parent and take > advantage of both the category framework and the coercion model > (including construction func

[sage-devel] A tutorial worksheet on coercion and categories

2011-06-11 Thread Simon King
Hi!, At http://www.sagenb.org/home/pub/2813, I have published a worksheet that aims at explaining how one can implement a new parent and take advantage of both the category framework and the coercion model (including construction functors). My approach was to implement fraction fields step by ste