Having a large graph, it will cause memory and kernel issues for SAGE to list all graph automorphisms. Is there a way to find the generators of the automorphisms instead of the whole automorphisms of a graph?
As in your previous question, you can use the tab-completion and discover the gens method:
sage: G = graphs.PetersenGraph()
sage: A = G.automorphism_group()
sage: A.gens()
[(3,7)(4,5)(8,9),
(2,6)(3,8)(4,5)(7,9),
(1,4,5)(2,3,8,6,9,7),
(0,1)(2,4,6,5)(3,9,8,7)]
and even the gens_small one, which provides a small set of generators:
sage: A.gens_small()
[(0,5,7,2,1)(3,6,4,8,9), (0,9,8,2)(1,4,6,3)(5,7)]
Asked: 2018-07-16 03:41:18 +0100
Seen: 353 times
Last updated: Jul 16 '18
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Please provide an example of a graph where one encounters this problem.