Ewald's book "Combinatorial convexity and algebraic geometry" defines the cospan of a (not strictly convex) cone to be its maximal linear subspace. I think we should stick to "dual" when it comes to lattices since this in the standard nomenclature in toric geometry.
Volker On Jun 25, 12:58 am, Andrey Novoseltsev <novos...@gmail.com> wrote: > * cone.spanned_lattice > * cone.quotient_lattice > * cone.cospanned_lattice > * cone.coquotient_lattice -- 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
