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From: | Jason Riedy |
Subject: | Re: [PATCH 0 of 4] Implement basic sparse op diag and diag op sparse support. |
Date: | Thu, 12 Mar 2009 10:57:40 -0400 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/23.0.91 (gnu/linux) |
And I write: > With the basic sparse & diag (and sparse & permutation) ops, I don't see > why either diag or sparse should fall back to sparse. Ok, with one exception. I have use for the convex combination of permutation matrices being sparse. But that I likely should wrap in a function that also would hide sparse(perm) constructions. Jason
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