#16604: new OA for n=112,160,176,208,224,352,416,514,544,640,796,896
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Reporter: ncohen | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.3
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers:
Authors: Nathann Cohen | Work issues:
Report Upstream: N/A | Commit:
Branch: public/16604 | 3d1482926f8621b2fc509aec9e6e4281244524af
Dependencies: #16582 | Stopgaps:
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Comment (by ncohen):
Yooooo !!!
> I read the Abel-Cheng paper of 1994 (written during Julian Abel's thesis
I guess) where the explanation was clear enough to write a complete
documentation. The function has moved to orthogonal_array.py...
Great ! It is cool to have a good doc for this construction. But the
function's name makes one think "Okay, this function takes c as an input
and return an OA with {{{n=2^c}}}".
> Please read three times the documentation to see whether its readable
and understandable. You can also complain about the ugly name I choose,
but in that case find something better.
Well. Did you read it three times yourself ? {{{:-P}}}
- Most of the function's one line description defines what n is, and at
this level we do not care much. What about {{{Returns an OA(k,|G_1|2^c)
from a constrained (G_1,k-1,2)-difference matrix}}} ? It is a bit more
meaningful and also indicates that the function's input is not as simple
as a pair of integers...
- Why `G_1` and not `G` ?
- Shouldn't we use `F_p` rather than `GF(2)` in the doc ?
- {{{that belong t}}}
- B and C : why not name them `A_{G_1}` and {{{A_{GF(2)} }}} ?
- {{{For any pair `i` and `j` of distinct integers in `{1,...,k-1}` and
`g` an element of `G_1`}}} --> {{{for any i\neq j and g\in G_1}}} ?
- `C_{i,k_1} - C_{i,k_1}` is zero `:-P`
- the array whose rowS
About the function's name here's my attempt:
`OA_p_times_2_pow_c_from_matrix` ? With your name one can believe that it
is just about powers of two. And the "from matrix" indicated that "if you
are looking for something standard, pass your way".
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/16604#comment:38>
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