There is already an affine space class (as affine scheme). Whats wrong with using that as ambient space?
sage: AffineSpace(2,QQ) Affine Space of dimension 2 over Rational Field Whats your plan with parent/element relations? It seems Hyperplane should be an element with HyperplaneArrangement the parent. Do you have a repository / trac ticket with the current code? On Sunday, July 21, 2013 5:54:25 PM UTC-4, davidp wrote: > > I have created three classes: AffineSpace, Hyperplane (inheriting from > AffineSpace), and HyperplaneArrangement. The methods in > HyperplaneArrangement that I have defined so far are (where 'a', below, is > a hyperplane arrangement): > > a.ambient_space a.num_bounded_regions > a.base_field a.num_hyperplanes > a.bounded_regions a.num_regions > a.change_base_field a.plot > a.characteristic_polynomial a.poincare_polynomial > a.cone a.polyhedron > a.deletion a.rank > a.dim a.region_containing_point > a.doubly_indexed_whitney_number a.regions > a.essentialization a.repr_point > a.face_vector a.restriction > a.has_good_reduction a.show > a.hyperplanes a.sign_vector > a.intersection_poset a.unbounded_regions > a.is_central a.union > a.is_essential a.whitney_data > a.is_linear a.whitney_number > a.is_separating_hyperplane > > Please let me know if there are other things you would like to see > included. > > Thanks, > Dave > > On Sunday, July 21, 2013 2:34:16 PM UTC-7, Volker Braun wrote: >> >> "center" is not a function but a method of Polyhedron_base. I suggest you >> read up on object-oriented programming and Python if that that doesn't >> answer your question. >> >> I'm definitely interested in hyperplane arrangements, though. Do you have >> a particular data structure in mind or is your plan to just keep a >> collection of hyperplanes? >> >> >> >> On Sunday, July 21, 2013 3:58:24 PM UTC-4, davidp wrote: >>> >>> I am working on a Sage package for hyperplane arrangements. In my file >>> hyperplane_arrangement.py, >>> I would like to use the function 'center' >>> from sage/geometry/polyhedron/basepy. (It finds the center of a >>> polyhedron.) >>> I have tried to import it with >>> >>> import from sage.geometry.polyhedron.base import center >>> >>> but that crashes Sage. I have tried several variations on this theme. >>> Could someone please tell me the magic words? >>> >>> Thanks, >>> Dave >>> >> -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/groups/opt_out.
