Opened 4 years ago

Closed 4 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: sage-6.9
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) Commit: 872bb7d26f03993cd80254757a0faba6ffaa4c61
Dependencies: Stopgaps:

Description

As the title says.

Change History (11)

comment:1 Changed 4 years ago by ncohen

  • Branch set to u/ncohen/18998
  • Status changed from new to needs_review

comment:2 Changed 4 years ago by git

  • Commit set to 5fcb5b9c7036b7f77c4a5e295e3a90163d60b047

Branch pushed to git repo; I updated commit sha1. New commits:

​f8b8bectrac #18995: Approximate LP solving: do not raise exceptions
​5fcb5b9trac #18998: Add a (175,72,20,36)-strongly regular graph

comment:3 Changed 4 years ago by git

  • Commit changed from 5fcb5b9c7036b7f77c4a5e295e3a90163d60b047 to 623b638fcc48e27390463a899468fcae42f6d15a

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

​623b638trac #18998: Add a (175,72,20,36)-strongly regular graph

comment:4 Changed 4 years ago by dimpase

  • Status changed from needs_review to positive_review

ok.

comment:5 Changed 4 years ago by dimpase

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 4 years ago by ncohen

  • Status changed from positive_review to needs_work

Good idea. Can you add a commit?

Nathann

comment:7 Changed 4 years ago by dimpase

  • 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 4 years ago by git

  • Commit changed from ec1c98dad0f898bd48d6e808c2f5048d5945b25f to 872bb7d26f03993cd80254757a0faba6ffaa4c61

Branch pushed to git repo; I updated commit sha1. New commits:

​872bb7dtrac #18998: Doc

comment:9 Changed 4 years ago by ncohen

  • Authors changed from Nathann Cohen to Nathann Cohen, Dima Pasechnik
  • 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:10 Changed 4 years ago by dimpase

  • Status changed from needs_review to positive_review

cool

comment:11 Changed 4 years ago by vbraun

  • Branch changed from public/18998 to 872bb7d26f03993cd80254757a0faba6ffaa4c61
  • Resolution set to fixed
  • Status changed from positive_review to closed
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