I am writing this code in sage online worksheet given a tuple say $a=(a_1,a_2,...a_n)$ \phi be an permutation in S_n then \phi(a)= (a_\phi(1),...,a_\phi(n)) I want to count the number of permutation that fixes a The code is as follows
def Aut(tuple): c=1 for a in SymmetricGroup(len(tuple)): if a.action(tuple)== tuple : c=c+1
There is no method action for elements of the symmetric group. You should write a(tuple) instead of a.action(tuple). And by the way, your function does not return anything, and I think c should be initialized to 0. Maybe:
def Aut(tuple):
c = 0
for a in SymmetricGroup(len(tuple)):
if a(tuple) == tuple:
c = c+1
return c
Asked: 2016-05-03 07:31:12 +0200
Seen: 423 times
Last updated: May 03 '16
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