#18989: Incorrect input_alphabet in FiniteStateMachine.disjoint_union
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Reporter: cheuberg | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.9
Component: finite state machines | Keywords:
Merged in: | Authors: Clemens Heuberger
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies: #18557
Stopgaps: |
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The following behaviour is a bug:
{{{
sage: A = Automaton([(0, 0, 0)])
sage: B = Automaton([(0, 0, 1)])
sage: A.input_alphabet
[0]
sage: B.input_alphabet
[1]
sage: (A + B).input_alphabet
[0]
}}}
The resulting input alphabet should be `[0, 1]`.
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Ticket URL: <http://trac.sagemath.org/ticket/18989>
Sage <http://www.sagemath.org>
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