#12997: LyndonWords from composition beginning by 0's
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Reporter: Adrien | Owner: sage-combinat
Type: defect | Status: new
Priority: minor | Milestone: sage-5.1
Component: combinatorics | Keywords: lyndon words, sage-combinat
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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LyndonWords, when applied to a composition starting with 0's, gives a
wrong result, e.g.:
for w in LyndonWords(list([0,1])):
print w
return 1 instead of 2, and in a similar vein
for w in LyndonWords(list([0,2])):
print w
return '12'
The problem is also described here : http://groups.google.com/group/sage-
combinat-devel/browse_thread/thread/5c4b691a692b56b0#
The problem is that necklace._sfc() ignores 0's at the begining of a list.
A modified lyndon_word.py file which fix the problem is attached.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12997>
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