#19180: A (220,84,38,28)-strongly regular graph
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Reporter: | Owner:
ncohen | Status: needs_review
Type: | Milestone: sage-6.9
enhancement | Resolution:
Priority: major | Merged in:
Component: graph | Reviewers:
theory | Work issues:
Keywords: | Commit:
Authors: | 7cbfa8b1425fccb6ca404a6f72f253b5ccf99eeb
Nathann Cohen | Stopgaps:
Report Upstream: N/A |
Branch: |
public/19180 |
Dependencies: |
#19133 |
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Comment (by ncohen):
> By the way, glancing through your code, you should probably use
`hamming_weight`
Right, it is faster indeed. It now takes ~12s. `hamming_weight` does the
job at a much lower level.
> and not `sum` to determine the hamming weight. Sum could (should?)
behave as over `GF(2)` in something like this code.
I apply it to ints, not to `GF(2)` elements.
Thanks,
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/19180#comment:5>
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