#18972: twographs and Seidel switching
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Reporter: dimpase | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.9
Component: graph theory | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/dimpase/seidelsw | b76c9a0369a5babc98481d6b96125c9b86f1adc9
Dependencies: | Stopgaps:
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Comment (by ncohen):
> There are many papers and book chapters written about Seidel adjacency
matrix and Seidel switching.
I had never heard of it before today. Hard to miss the laplacian matrix,
though.
> I don't know what you are talking about: go read
https://en.wikipedia.org/wiki/Syntactic_sugar
> Googling "syntactic sugar" gives you over 300,000 hits.
It was mostly a joke. I did not expect him to have invented the sentence.
> Anyhow, if you are not willing to allow `Seidel_adjacency_matrix` into
Sage graphs, I'd stop working on this implementation now.
Did you hear me say that I "would not allow it"? For sure I don't like it,
but that did not stop me from accepting code that other thought useful.
Also, you add long lines of code to an already very very heavy
constructor, while you could turn it into an adjacency matrix with a one-
liner.. But that would result in possibly misleading error messages.
What I said is that I do not see the added value and it is true. I said
that the best way to write seydel_switching was to not use this new
function. And also that it should be in small case unless a new standard
is decided that applies to all of sage.
Nathann
--
Ticket URL: <http://trac.sagemath.org/ticket/18972#comment:7>
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