#17652: Difference matrix product
-------------------------------------+-------------------------------------
Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.5
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers:
Authors: Vincent Delecroix | Work issues:
Report Upstream: N/A | Commit:
Branch: public/17652 | 7ceb954856dfdaa05c1918d49bcb4957624f0fcd
Dependencies: | Stopgaps:
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Changes (by ncohen):
* status: needs_review => needs_work
Comment:
Hellooooooooooooo !!
Several comments:
- It's a pity to do the computations twice when lmbda1=lmbda2 (g1~g2
symmetry). But perhaps that does not matter considering the timings
involved.
- The comment on the infinite loops does not match the code that follows
(the
code is right)
- Why a {{{M = zip(*M)}}}? Isn't it better to change the loop above in
order to
compute the right matrix?
- The new doctest {{{designs.difference_matrix(56,None,existence=1)}}}
returned
the same answer in the latest beta. Did you mean to test the new
construction?
- Could you write an INPUT section for the two functions?
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/17652#comment:2>
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