Hi William,
Oops, I forgot to post my reply to my own message. This is the
solution I found,
using the same GAP manual entry for PermList.
def gap_format_cycles(x):
"""
Put a permutation in Gap format, as a string.
"""
x = str(x).replace(' ','')
return x.replace('),(',')(').replace('[','').replace(']','')
def gap_format_images(x):
"""
Put a permutation in Gap format, as a string.
"""
return "PermList(" + str(x) + ")"
I hadn't yet sorted out how to preserve the "correct" cycle printing,
as the __gap is used
also for printing.
This will be useful for creating transposition ciphers.
--David
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