#13813: Fix bug in chessboard graphs generator
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Reporter: dcoudert | Owner: jason, ncohen, rlm
Type: defect | Status: new
Priority: major | Milestone: sage-5.6
Component: graph theory | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors: David Coudert
Merged in: | Dependencies:
Stopgaps: |
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We should normally have:
* The BishopGraph([d1,d2],radius=r) is isomorphic to the graph obtained
merging the edges of the KnightGraphs([d1,d2],one=i,two=i) for 1<= i <= r.
* The QueenGraph([d1,d2],radius=r) is isomorphic to the graph obtained
merging the edges of a RookGraph([d1,d2,radius=r) and a
BishopGraph([d1,d2],radius=r)
With current implementation, the result was sometimes incorrect. This
patch solves this issue and adds necessary tests.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13813>
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