Talk:Lanczos algorithm: Difference between revisions

Revision as of 06:32, 2 March 2008

Revision as of 03:09, 11 September 2008

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So Lanczos gives you a tridiagonal matrix. I think a link would be helpful which explains how to extract low eigenvalues/eigenvectors from this matrix. <small>—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/209.6.144.249|209.6.144.249]] ([[User talk:209.6.144.249|talk]]) 06:30, 2 March 2008 (UTC)</small><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->

:agree - or largest eigenvalues: anyway, the article starts by saying that it's for calculating eigenvalues, but then only describes how it's used to get tridiag. matrix.

:b.t.w., the algorithm calculates up to v[m+1], I think this could be avoided. (also, "unrolling" the 1st part of the m=1 case as initialization should allow to avoid using v[0].) &mdash; [[User:MFH|MFH]]:[[User talk:MFH|Talk]] 03:09, 11 September 2008 (UTC)

:PS: also, it should be said what is 'm'...