Opened 5 years ago
Closed 5 years ago
#19216 closed enhancement (fixed)
Suzukirelated strongly regular graphs
Reported by:  ncohen  Owned by:  

Priority:  major  Milestone:  sage6.9 
Component:  graph theory  Keywords:  
Cc:  dimpase  Merged in:  
Authors:  Nathann Cohen  Reviewers:  Dima Pasechnik 
Report Upstream:  N/A  Work issues:  
Branch:  262998b (Commits)  Commit:  262998b25997a8a60d62df98e2175f2f0ae067d1 
Dependencies:  #19184  Stopgaps: 
Description
This ticket adds several Suzukirelated groups and graphs.
Change History (13)
comment:1 Changed 5 years ago by
 Branch set to public/19216
 Commit set to 6c56dda4eda61ae53bb683e22838f877ed1724ca
 Status changed from new to needs_review
comment:2 Changed 5 years ago by
this seems to be the place where using GAP instead of libGAP makes things much slower...
comment:3 Changed 5 years ago by
also, if we care about being fast, the faster way to build the graph on 416 vertices is from its automorphism group, which is available as Atlas group:
comment:4 Changed 5 years ago by
 Commit changed from 6c56dda4eda61ae53bb683e22838f877ed1724ca to 9fac0299c28a614d5d1ed797fd8cef0e36d5e19d
Branch pushed to git repo; I updated commit sha1. Last 10 new commits:
848a972  trac #19184: the SRG at last !

fbe7bb9  trac #19184: Broken doctest

2ceb7ee  Merge branch 'public/19184' of git://trac.sagemath.org/sage into hs

a0eabd4  cite [BvL84]

c07f2bc  no need to take complement

994aa33  SRG on 105 vertices for L(3,4)

8d615c2  less crude code in SRG_176_49_12_14

717e356  Merge branch 'public/19184' of git://trac.sagemath.org/sage into hs

e8c2668  Merge remotetracking branch 'trac/public/19216' into suz

9fac029  3.5fold speedup of SRG_560 using libgap

comment:5 Changed 5 years ago by
 Commit changed from 9fac0299c28a614d5d1ed797fd8cef0e36d5e19d to 4d8c73320da8c11d0be4e9474f5a0dfc87944a01
Branch pushed to git repo; I updated commit sha1. New commits:
4d8c733  optimised constuction of SRG_416_100_36_20 and added SRG_144_39_6_12

comment:6 followup: ↓ 8 Changed 5 years ago by
Merging this branch with the NO/NU branch was unnecessary (as was probably proved by the fact that there was no conflict) and results in a very unclean history, that I find very hard to read if I have to review the commits that you added.
comment:7 Changed 5 years ago by
 Branch changed from public/19216 to u/ncohen/19216
 Commit changed from 4d8c73320da8c11d0be4e9474f5a0dfc87944a01 to 262998b25997a8a60d62df98e2175f2f0ae067d1
I pushed back my original branch, on top of which I cherrypicked (git terminology) what I believe to be the only two commits that you added that are related to this branch. I also updated their message so that it contains the ticket number (please do this in the future).
I did not overwrite public/19216
but pushed everything to u/ncohen/19216
, you can thus find your old branch if you need it. In the future, however, please ask me whenever you want to see one of my tickets merged with something else, as by doing it yourself you give me much more work.
I agree with your two commits, and I thank you for the improvements and addition. You also told me often to use libgap, and I often forget to. Sorry for that.
Please check that I did not miss any of the commits you wanted to see here, and set the ticket to positive_review
if you agree with it. Please fill your name in the 'reviewer' field, or Volker will invalidate the ticket.
Nathann
New commits:
b049232  trac #19216: 3.5fold speedup of SRG_560 using libgap

262998b  trac #19216: optimised constuction of SRG_416_100_36_20 and added SRG_144_39_6_12

comment:8 in reply to: ↑ 6 Changed 5 years ago by
Replying to ncohen:
Merging this branch with the NO/NU branch was unnecessary (as was probably proved by the fact that there was no conflict) and results in a very unclean history, that I find very hard to read if I have to review the commits that you added.
Apologies. Probably my develop branch is messed up, and messing up anything on top of it. Anyhow, I did not overwrite anything this time. (I looked what I did, and I merged it over HigmanSims design ticket, as I didn't want to trigger a big recompile, and then, when I decided to add/change stuff, I forgot about it... :[)
comment:9 Changed 5 years ago by
 Reviewers set to Dima Pasechnik
 Status changed from needs_review to positive_review
comment:10 Changed 5 years ago by
by the way, how about reorganising the source of strongly_regular_db: namely, moving all the graph constructions out of there, say, to generators/srg.py(x) ?
comment:11 Changed 5 years ago by
Hmmmmm... Everything in "generators/" is usually exposed in graphs.<tab>
, and in this case I am not sure that we want that.
To me having this stuff in this file means that it is not very important of its own. What about only reorganizing the file by moving all the graph constructors at the end of it? It does not bother me much personally.
Nathann
comment:12 Changed 5 years ago by
Thank you for this review, by the way.
Nathann
comment:13 Changed 5 years ago by
 Branch changed from u/ncohen/19216 to 262998b25997a8a60d62df98e2175f2f0ae067d1
 Resolution set to fixed
 Status changed from positive_review to closed
New commits:
trac #19184: HigmanSims design
trac #19184: SRG on 105 vertices for L(3,4)
trac #19216: Suzukirelated strongly regular graphs