construct "fuzzy ball" graphs

[jasongrout]

The Fuzzy Ball graphs are cospectral with respect to the normalized laplacian matrix. This patch makes a function to construct such graphs. I will be adding a reference in a separate patch once we publish our paper :).

CC: @nathanncohen @rlmill

Component: graph theory

Author: Jason Grout

Reviewer: Nathann Cohen

Merged: sage-4.4.4.alpha0

Issue created by migration from https://trac.sagemath.org/ticket/9142

[jasongrout]

Attachment: trac-9142-fuzzy-ball.patch.gz

[nathanncohen]

comment:2

Positive review to this patch, which will be nicer with a reference :-)

I add a small patch with minor corrections : some math formulas were written plain text, which reflects badly on the indices. "Anyone but me can review this patch", as Minh says !

Nathann

[nathanncohen]

comment:5

Please forget about my patch, as it makes no difference. I can not see why, though O_o

[nathanncohen]

comment:6

Only because dvipng was not installed on my machine. Please consider my patch anew, and my excuses for this mistake :-)

Nathann

[nathanncohen]

comment:7

I had forgotten to add the "r" in front of """. Updated !

Nathann

[jasongrout]

Attachment: trac_9142-reviewer.patch.gz

apply on top of previous patches

[jasongrout]

comment:8

Attachment: trac-9142-small-doc-fix.patch.gz

Positive review to your patch. Can you look at my minor change in the explanation, to make it clear that you pass a list instead of a sum in for the partition?

[nathanncohen]

comment:9

Agreed :-)

Nathann

[mwhansen]

Merged: sage-4.4.4.alpha0

[mwhansen]

Reviewer: Nathann Cohen