Opened 4 years ago

Closed 4 years ago

#17047 closed enhancement (fixed)

Isomorphism of incidence structures

Reported by: ncohen Owned by:
Priority: major Milestone: sage-6.4
Component: combinatorial designs Keywords:
Cc: vdelecroix, dimpase Merged in:
Authors: Nathann Cohen Reviewers: Dima Pasechnik
Report Upstream: N/A Work issues:
Branch: a7be076 (Commits) Commit: a7be076f3f68804ca4e50801addb858e1f89e2f9
Dependencies: Stopgaps:

Description

Heeeeeere it is !

Adds three functions: is_isomorphic, canonical_label, and copy (I needed that).

Nathann

Change History (14)

comment:1 Changed 4 years ago by ncohen

  • Branch set to u/ncohen/17047
  • Status changed from new to needs_review

comment:2 Changed 4 years ago by git

  • Commit set to fb2829d5181adf3c676e3a02ebf62168726691ab

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

​fb2829dtrac #17047: Isomorphism of incidence structures

comment:3 Changed 4 years ago by dimpase

shouldn't you do g=Graph(data_structure="static_sparse") rather than the default Graph?

comment:4 Changed 4 years ago by ncohen

I am not sure what exactly the code does with respect to the data structure. Perhaps it copies it, I am not sure O_o

Nathann

comment:5 Changed 4 years ago by ncohen

Either way I don't think that this code should do that. If the isomorphism code is faster with static graphs, then it should do a copy itself.

Creating a static graph is the same as creating it with the 'normal' data structure then copying it into a static version anyway.

Nathann

comment:6 Changed 4 years ago by ncohen

Ping ?

comment:7 Changed 4 years ago by ncohen

  • Component changed from combinatorics to combinatorial designs

comment:8 Changed 4 years ago by dimpase

  • Reviewers set to Dima Pasechnik
  • Status changed from needs_review to positive_review

LGTM

comment:9 Changed 4 years ago by ncohen

Thanks !

Nathann

comment:10 Changed 4 years ago by vbraun

  • Branch changed from u/ncohen/17047 to fb2829d5181adf3c676e3a02ebf62168726691ab
  • Resolution set to fixed
  • Status changed from positive_review to closed

comment:11 Changed 4 years ago by vbraun

  • Commit fb2829d5181adf3c676e3a02ebf62168726691ab deleted
  • Resolution fixed deleted
  • Status changed from closed to new 
sage -t --long src/sage/combinat/designs/incidence_structures.py
**********************************************************************
File "src/sage/combinat/designs/incidence_structures.py", line 560, in sage.combinat.designs.incidence_structures.IncidenceStructure.copy
Failed example:
    IS.blocks()
Expected:
    [[1, 2, 3, 'e']]
Got:
    [['e', 1, 2, 3]]
**********************************************************************
File "src/sage/combinat/designs/incidence_structures.py", line 566, in sage.combinat.designs.incidence_structures.IncidenceStructure.copy
Failed example:
    copy(IS).blocks()
Expected:
    [[1, 2, 3, 'e']]
Got:
    [['e', 1, 2, 3]]
**********************************************************************
1 item had failures:
   2 of   7 in sage.combinat.designs.incidence_structures.IncidenceStructure.copy
    [279 tests, 2 failures, 1.99 s]

comment:12 Changed 4 years ago by ncohen

  • Branch changed from fb2829d5181adf3c676e3a02ebf62168726691ab to u/ncohen/17047
  • Commit set to a7be076f3f68804ca4e50801addb858e1f89e2f9
  • Status changed from new to needs_review

Sorry T_T

New commits:

​fb2829dtrac #17047: Isomorphism of incidence structures
​88e6ebctrac #17047: Merged with beta6
​a7be076trac #17047: Broken doctest

comment:13 Changed 4 years ago by ncohen

  • Status changed from needs_review to positive_review

comment:14 Changed 4 years ago by vbraun

  • Branch changed from u/ncohen/17047 to a7be076f3f68804ca4e50801addb858e1f89e2f9
  • Resolution set to fixed
  • Status changed from positive_review to closed
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