#16884: Quasi-difference matrices (database+is_QDM)
-------------------------------------+-------------------------------------
Reporter: ncohen | Owner:
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-6.4
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers:
Authors: Nathann Cohen | Work issues:
Report Upstream: N/A | Commit:
Branch: public/16884 | 15c78ba967f5f15644a7eb83f2825de3ba5fd7fd
Dependencies: #16879 | Stopgaps:
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Changes (by vdelecroix):
* status: needs_review => needs_info
Comment:
Hello,
1) In the definition of quasi difference matrix, why do you require the
group G to be Abelian? I saw that your definition coincides with the one
from the handbook... but still. The question is just why. I don't mind the
restriction since I do not know of any example on a non-commutative group.
2) You did not modify the doctests, is it on purpose
{{{
$ sage -coverage database.py
------------------------------------------------------------------------
SCORE database.py: 100.0% (68 of 68)
Possibly wrong (function name doesn't occur in doctests):
* line 1955: def QDM_19_6_1_0_1()
* line 1987: def QDM_21_5_1_0_1()
* line 2032: def QDM_21_6_1_0_5()
* line 2070: def QDM_25_6_1_0_5()
* line 2113: def QDM_33_6_1_0_1()
* line 2154: def QDM_37_6_1_0_1()
* line 2190: def QDM_35_7_1_0_7()
* line 2225: def QDM_45_7_1_0_9()
* line 2260: def QDM_54_7_1_0_8()
* line 2295: def QDM_57_9_1_0_8()
------------------------------------------------------------------------
}}}
For the following see `public/16884b`
1') I got an error building the doc, because you used `::` instead of `:`
in `is_quasi_difference_matrix`.
Vincent
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Ticket URL: <http://trac.sagemath.org/ticket/16884#comment:10>
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