<div dir="ltr"><br><br>On Monday, March 2, 2020 at 11:10:39 AM UTC+1, jgh wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">Hi
<br>
<br>this is related to this paper
<br>
<br>A smooth ℓ1-norm sparseness function for orbital based linear scaling total energy minimization
<br>J. Chem. Phys. 128, 064107 (2008); <a href="https://doi.org/10.1063/1.2828507" target="_blank" rel="nofollow" onmousedown="this.href='https://www.google.com/url?q\x3dhttps%3A%2F%2Fdoi.org%2F10.1063%2F1.2828507\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNEb2HPdhVRCXuDh1ohiMH_uH3vRTg';return true;" onclick="this.href='https://www.google.com/url?q\x3dhttps%3A%2F%2Fdoi.org%2F10.1063%2F1.2828507\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNEb2HPdhVRCXuDh1ohiMH_uH3vRTg';return true;">https://doi.org/10.1063/1.<wbr>2828507</a>
<br>Valéry Weber and Jürg Hutter
<br>
<br>regards
<br>
<br>Juerg Hutter
<br>------------------------------<wbr>------------------------------<wbr>--
<br>Juerg Hutter Phone : ++41 44 635 4491
<br>Institut für Chemie C FAX : ++41 44 635 6838
<br>Universität Zürich E-mail: <a href="javascript:" target="_blank" gdf-obfuscated-mailto="cJrCoWAlAQAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">h...@chem.uzh.ch</a>
<br>Winterthurerstrasse 190
<br>CH-8057 Zürich, Switzerland
<br>------------------------------<wbr>------------------------------<wbr>---
<br>
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<br>To: "cp2k" <<a href="javascript:" target="_blank" gdf-obfuscated-mailto="cJrCoWAlAQAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">c...@googlegroups.com</a>>
<br>From: "Soumya Ghosh"
<br>Sent by: <a href="javascript:" target="_blank" gdf-obfuscated-mailto="cJrCoWAlAQAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">c...@googlegroups.com</a>
<br>Date: 02/26/2020 04:25PM
<br>Subject: [CP2K:12927] L1SD for wannier localization
<br>
<br>Dear developers,
<br>
<br>I have used both L1SD and Jacobi rotation for wannier localization and both methods are giving similar results for my system. I have 2 theoretical questions though:
<br>
<br>1. It seems to me that L1SD actually uses L2 norm (f2 in the code) of the eigenvector matrix. Is this true or am I wrong?
<br>
<br>2. It seems to me that this steepest descent (SD) is not related to the SD method eluded by Silvestrelli PRB, 1999, 59, 9703. It seems to me that in L1SD@CP2K the gradient for SD is computed based on the L2 norm of the eigenvector matrix whereas in the SD method of the paper one uses the gradient of the spread functional, thus updating the "z_In" at each iteration. I wonder why the original SD method is not implemented in CP2K.
<br>
<br>Please let me know. Thanks.
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<br></blockquote><div><br></div><div><br></div><div>Dear Prof. Hutter,</div><div><br></div><div>Thanks. </div><blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">
<br></blockquote></div>