Opened 2 years ago
Closed 2 years ago
#26528 closed enhancement (fixed)
avoid using .vertices() in comparability, hyperbolicity and distances_all_pairs
Reported by:  dcoudert  Owned by:  

Priority:  major  Milestone:  sage8.5 
Component:  graph theory  Keywords:  py3, graph 
Cc:  tscrim, chapoton  Merged in:  
Authors:  David Coudert  Reviewers:  Travis Scrimshaw 
Report Upstream:  N/A  Work issues:  
Branch:  564cb70 (Commits)  Commit:  564cb700c9d5e3ca4c4689dc25006a651d76f2bc 
Dependencies:  Stopgaps: 
Description
We expose the new parameter vertex_list
of init_short_digraph
in methods of distances_all_pairs.pyx
and so
 add the same parameter to methods of
distances_all_pairs.pyx
 remove the use of
.vertices()
inhyperbolicity.pyx
andcomparability.pyx
We could do the same in bandwidth.pyx
but this might be in conflict with #26520
Several use of .vertices()
remain in distances_all_pairs.pyx
that are harder to remove.
Change History (8)
comment:1 Changed 2 years ago by
 Branch set to public/26528_reduce_use_of_vertices
 Cc tscrim chapoton added
 Commit set to 90c83bc872f8969c016bf8956f26be4bac0aaa0e
 Status changed from new to needs_review
comment:2 Changed 2 years ago by
I am not convinced that the test for is_transitive
is always going to give the same answer:
sage: digraphs.DeBruijn(5,2).is_transitive(certificate=True)  ('00', '10') + ('22', '02')
I think a more robust test would be to verify this by:
sage: G = digraphs.DeBruijn(5,2) sage: cert = G.is_transitive(certificate=True) sage: G.has_edge(*cert) False sage: G.shortest_path(*cert) != [] True
comment:3 Changed 2 years ago by
Also, I think it would be better to do `0..n1`
> `(0, \ldots, n1)`
. Moreover, you need to change `i`th
> `i`th
because Sphinx would not treat the closing backtick like it should.
Otherwise LGTM.
comment:4 Changed 2 years ago by
 Reviewers set to Travis Scrimshaw
comment:5 Changed 2 years ago by
 Commit changed from 90c83bc872f8969c016bf8956f26be4bac0aaa0e to 564cb700c9d5e3ca4c4689dc25006a651d76f2bc
Branch pushed to git repo; I updated commit sha1. New commits:
564cb70  trac #26528: reviewer's comments

comment:6 Changed 2 years ago by
Thanks for the comments.
comment:8 Changed 2 years ago by
 Branch changed from public/26528_reduce_use_of_vertices to 564cb700c9d5e3ca4c4689dc25006a651d76f2bc
 Resolution set to fixed
 Status changed from positive_review to closed
Hope you like it ;)
New commits:
trac #26528: reduce use of .vertices() in distances_all_pairs