#16597: Singer difference set and fix OA_9_135
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.3
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers:
Authors: Vincent Delecroix | Work issues:
Report Upstream: N/A | Commit:
Branch: | 10c9beb0a672b3b5c628d7b206b6dbc49aae5848
u/vdelecroix/16597 | Stopgaps:
Dependencies: #16553,#16617 |
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Comment (by ncohen):
> There is just a subtlety that I did not tell you. If you follow my words
you have "too much" integers `i` (if you have `z^i` you also have `z^(i +
n*(q^(e+1)-1)/(q^d-1))` or in other words the element `z^i x` with `x` in
`Ksmall`). If you only store the smallest `i` as I did, everything is fine
since you start to see two points on the same `Ksmall`-line only after you
see all the lines least once...
I see, I see. Could you also put it in the doc ? By the way, shouldn't
there be a field function somewhere that gives you the logarithm of a
field element with respect to `z` ? Something that would be more efficient
than enumeration ?
Nathann
--
Ticket URL: <http://trac.sagemath.org/ticket/16597#comment:33>
Sage <http://www.sagemath.org>
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