Hi Andrey, Why not allow arbitrary polytopal toric varieties instead of the resolution of singular fano ones? The larger class still benefits from the lattice polytope description and you can still talk about the anticanonical divisor if you want. FanoToricVarietyCrepantResolution_field is too long :-) Also, you usually don't want to resolve all singularities. GorensteinFanoToricVariety_field would work in a pinch.
The M/N lattices occur all the time and especially beginners tend to confuse the two. This is why I find it very important to strictly separate these two; In particular 1) All methods should raise errors whenever you pass a point from the "wrong lattice". 2) _repr_() should make it unambiguous as to which lattice the point lies in; I chose to print "N(1,2)". I found it very useful to be able to construct them with N(1,2) etc, this is implemented as a rather crude hack in my toric_lattices.py file. Volker -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
