Number of graph automorphisms

ASH
85 ●3 ●4 ●12

Using the below command in SAGE 8.2, the list of automorphisms for a graph could be attained. G.automorphism_group().list()

What is the command for computing the number of graph automorphoisms?

If you give a name to your automorphism group:

sage: A = G.automorphism_group()

Then, you can see all methods that apply to it:

sage: A.<TAB>

where <TAB> stands for the tabulation key.

You can see that there is a cardinality method that answers your question:

sage: A.cardinality()

If you could not find such a method, you could always compute the length of the list you obtained:

sage: len(A.list())

Comments

Thanks. It works.

ASH ( 2018-07-15 13:30:12 +0200 )edit

You can also enter A? to get full documentation on the group instance listing all the implemented methods.

Iguananaut ( 2018-07-16 11:57:13 +0200 )edit

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