<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hello PETSc/SLEPc users,<div class=""><br class=""></div><div class="">Similar to a recent question I am looking for an algorithm to compute the smallest eigenvalue and eigenvector for a bunch of matrices however I have a few extra “restrictions”. All matrices have the following properties:</div><div class=""><br class=""></div><div class="">- All matrices are the same size</div><div class="">- All matrices are small (perhaps no larger than 12x12)</div><div class="">- All matrices are SPD</div><div class="">- I only need the smallest eigenpair</div><div class=""><br class=""></div><div class="">So far my best bet seems to be Lanczos but I’m wondering if there is some wunder method I’ve overlooked.</div><div class=""><br class=""><div class="">
<div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div>Best regards,<br class=""><br class="">Jacob Faibussowitsch<br class="">(Jacob Fai - booss - oh - vitch)<br class=""></div></div></div>
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