#10054: Provide an alphabet to the parent of any generated word
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Reporter: tmonteil | Owner: sage-combinat
Type: defect | Status: new
Priority: major | Milestone: sage-4.7
Component: combinatorics | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by abmasse):
I checked one by one all the generated words in Sage. They all have parent
alphabets except two:
{{{
sage: words.CharacteristicSturmianWord(1/sqrt(2)).parent()
Words over Ordered Alphabet [0, 1]
sage: words.ChristoffelWord(4,7).parent()
Words over Ordered Alphabet [0, 1]
sage: words.CodingOfRotationWord(0.1234, 0.5678, alphabet='01').parent()
Words over Ordered Alphabet ['0', '1']
sage: words.FibonacciWord().parent()
Words over Ordered Alphabet [0, 1]
sage: words.FixedPointOfMorphism(WordMorphism('a->ab,b->a'), 'a').parent()
Words over Ordered Alphabet ['a', 'b']
sage: words.KolakoskiWord().parent()
Words over Ordered Alphabet [1, 2]
sage: words.LowerChristoffelWord(4,3).parent()
Words over Ordered Alphabet [0, 1]
sage: words.MinimalSmoothPrefix(20).parent()
Words over Ordered Alphabet [1, 2]
sage: words.PalindromicDefectWord(5, 'ab').parent()
Words over Ordered Alphabet ['a', 'b']
sage: words.RandomWord(15, 3, alphabet='abc').parent()
Words over Ordered Alphabet ['a', 'b', 'c']
sage: words.StandardEpisturmianWord(Words('ab')('ab')).parent()
Words over Ordered Alphabet ['a', 'b']
sage: words.ThueMorseWord().parent()
Words over Ordered Alphabet [0, 1]
sage: words.UpperChristoffelWord(2,3).parent()
Words over Ordered Alphabet [0, 1]
sage: phi = WordMorphism('a->abc,b->ca,c->bb')
sage: words.dual_fibonacci_tile(3).parent()
Word Paths on the square grid
sage: words.fibonacci_tile(3).parent()
Word Paths on the square grid
sage: words.s_adic([phi], 'a').parent()
Words over Ordered Alphabet ['a', 'b', 'c']
}}}
These ones should be corrected:
{{{
sage: words.LowerMechanicalWord(sqrt(2) - 1).parent()
Words
sage: words.UpperMechanicalWord(sqrt(2) - 1).parent()
Words
}}}
Is is the goal of this ticket? Just to correct those two generated words?
If so, I can write a patch, but I want to make sure I understand correctly
what it is about.
Alex
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10054#comment:2>
Sage <http://www.sagemath.org>
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