Changes between Initial Version and Version 9 of Ticket #27232


Ignore:
Timestamp:
02/22/19 09:14:03 (3 years ago)
Author:
jipilab
Comment:

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  • Ticket #27232

    • Property Cc dcoudert dimpase added
    • Property Component changed from algebra to graph theory
    • Property Summary changed from is_permutation_of broken for matrices over cyclotomic fields to is_isomorphic broken with keyword edge_labels=True
    • Property Branch changed from to public/27232_first_trial
    • Property Keywords graph is_isomorphic added
    • Property Commit changed from to a1f9014ce505baaad8d6bbfb5cb352d09c526690
  • Ticket #27232 – Description

    initial v9  
     1This code led to finding this bug in the `is_isomorphic` method.
     2
    13Here is a simple working example:
    24
     
    3234False
    3335}}}
     36
     37This error is provoked at the level of graphs:
     38
     39{{{
     40sage: g1 = p1.as_bipartite_graph()
     41sage: g2 = p2.as_bipartite_graph()
     42sage: sorted(g1.edge_labels())
     43[1, -1, -1, -1, -1, -1, 1, 0, -1]
     44sage: sorted(g2.edge_labels())
     45[-1, -1, -1, -1, 1, -1, -1, 1, 0]
     46}}}