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	<title>Thomson problem in OPTIM - Revision history</title>
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	<updated>2026-04-12T04:38:32Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://wikis.ch.cam.ac.uk/ro-walesdocs/wiki/index.php?title=Thomson_problem_in_OPTIM&amp;diff=1195&amp;oldid=prev</id>
		<title>Adk44: Created page with &quot;This is what I have done to make the Thomson problem works in OPTIM:  1. copy Gthomson.f90 from GMIN and work out the Hessian  2. Fudge the number of atoms in fetchz.f  3. In...&quot;</title>
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		<updated>2019-05-10T17:28:12Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;This is what I have done to make the Thomson problem works in OPTIM:  1. copy Gthomson.f90 from GMIN and work out the Hessian  2. Fudge the number of atoms in fetchz.f  3. In...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;This is what I have done to make the Thomson problem works in OPTIM:&lt;br /&gt;
&lt;br /&gt;
1. copy Gthomson.f90 from GMIN and work out the Hessian&lt;br /&gt;
&lt;br /&gt;
2. Fudge the number of atoms in fetchz.f&lt;br /&gt;
&lt;br /&gt;
3. In geopt.f, NEXMODES = 1&lt;br /&gt;
&lt;br /&gt;
4. In hybridmin.f, add SHIFTHGTH&lt;br /&gt;
&lt;br /&gt;
5. Does the keyword reading in keywords.f&lt;br /&gt;
&lt;br /&gt;
6. Edit potential.f, key.f90&lt;br /&gt;
&lt;br /&gt;
7. Edit efol.f90, ZT(1) = .FALSE.&lt;br /&gt;
&lt;br /&gt;
8. Add GTHOMSONT in myorient.f90 to advantage of the symmetry&lt;br /&gt;
&lt;br /&gt;
7. Lots of edits in CONNECT/ncutils.f90.&lt;br /&gt;
&lt;br /&gt;
8. In mindist.f, minpermdist.f90, newmindist.f90, recall if they are in the reduced representations. To do this I need to copy these subroutines and duplicate them with HK...f90. See Gthomson.f90&lt;br /&gt;
 &lt;br /&gt;
To do?&lt;br /&gt;
&lt;br /&gt;
1. In OPTIM.F, SHIFTL(1-6) = SHIFTV, need to specify all 6?&lt;br /&gt;
&lt;br /&gt;
2. It seems eigenvalue shifting is not really working - check bfgsts.f. I have to use NOHESS&lt;br /&gt;
&lt;br /&gt;
3. Potential problem in ADDNEWMIN. Ignore error when D.LT.GEOMDIFFTOL&lt;/div&gt;</summary>
		<author><name>Adk44</name></author>
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