Opened 6 years ago
Closed 6 years ago
#18998 closed enhancement (fixed)
Add a (175,72,20,36)strongly regular graph, and two more similarly constructed ones
Reported by:  ncohen  Owned by:  

Priority:  major  Milestone:  sage6.9 
Component:  graph theory  Keywords:  
Cc:  dimpase  Merged in:  
Authors:  Nathann Cohen, Dima Pasechnik  Reviewers:  Nathann Cohen, Dima Pasechnik 
Report Upstream:  N/A  Work issues:  
Branch:  872bb7d (Commits, GitHub, GitLab)  Commit:  872bb7d26f03993cd80254757a0faba6ffaa4c61 
Dependencies:  Stopgaps: 
Description
As the title says.
Change History (11)
comment:1 Changed 6 years ago by
 Branch set to u/ncohen/18998
 Status changed from new to needs_review
comment:2 Changed 6 years ago by
 Commit set to 5fcb5b9c7036b7f77c4a5e295e3a90163d60b047
comment:3 Changed 6 years ago by
 Commit changed from 5fcb5b9c7036b7f77c4a5e295e3a90163d60b047 to 623b638fcc48e27390463a899468fcae42f6d15a
Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:
623b638  trac #18998: Add a (175,72,20,36)strongly regular graph

comment:5 Changed 6 years ago by
perhaps we could add a similar example here:
sage: G=graphs.JohnsonGraph(9,4).distance_graph([1,4]) sage: G.is_strongly_regular(parameters=True) (126, 25, 8, 4)
comment:6 Changed 6 years ago by
 Status changed from positive_review to needs_work
Good idea. Can you add a commit?
Nathann
comment:7 Changed 6 years ago by
 Branch changed from u/ncohen/18998 to public/18998
 Commit changed from 623b638fcc48e27390463a899468fcae42f6d15a to ec1c98dad0f898bd48d6e808c2f5048d5945b25f
 Status changed from needs_work to needs_review
 Summary changed from Add a (175,72,20,36)strongly regular graph to Add a (175,72,20,36)strongly regular graph, and two more similarly constructed ones
comment:8 Changed 6 years ago by
 Commit changed from ec1c98dad0f898bd48d6e808c2f5048d5945b25f to 872bb7d26f03993cd80254757a0faba6ffaa4c61
Branch pushed to git repo; I updated commit sha1. New commits:
872bb7d  trac #18998: Doc

comment:9 Changed 6 years ago by
 Reviewers set to Nathann Cohen, Dima Pasechnik
I added a commit to fix a doc problem. If that's okay with you, we can set this as 'positive review'.
Nathann
comment:11 Changed 6 years ago by
 Branch changed from public/18998 to 872bb7d26f03993cd80254757a0faba6ffaa4c61
 Resolution set to fixed
 Status changed from positive_review to closed
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Branch pushed to git repo; I updated commit sha1. New commits:
trac #18995: Approximate LP solving: do not raise exceptions
trac #18998: Add a (175,72,20,36)strongly regular graph