1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD> <link rel="canonical" href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Tao/TAOLMVM.html" />
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>TAOLMVM</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.10.3 v3.10.3 docs/manualpages/Tao/TAOLMVM.html "><small>Report Typos and Errors</small></a></div>
<A NAME="TAOLMVM"><H1>TAOLMVM</H1></A>
Limited Memory Variable Metric method is a quasi-Newton optimization solver for unconstrained minimization. It solves the Newton step Hkdk = - gk using an approximation Bk in place of Hk, where Bk is composed using
the BFGS update formula. A More-Thuente line search is then used
to computed the steplength in the dk direction
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<DT><B>-tao_lmvm_recycle </B> -enable recycling LMVM updates between <A HREF="../Tao/TaoSolve.html#TaoSolve">TaoSolve</A>() calls
<br>
<DT><B>-tao_lmvm_no_scale </B> -(developer) disables diagonal Broyden scaling on the LMVM approximation
<br>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>beginner<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/tao/unconstrained/impls/lmvm/lmvm.c.html#TAOLMVM">src/tao/unconstrained/impls/lmvm/lmvm.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/tao/unconstrained/examples/tutorials/eptorsion1.c.html">src/tao/unconstrained/examples/tutorials/eptorsion1.c.html</A><BR>
<A HREF="../../../src/tao/unconstrained/examples/tutorials/rosenbrock1.c.html">src/tao/unconstrained/examples/tutorials/rosenbrock1.c.html</A><BR>
<A HREF="../../../src/tao/unconstrained/examples/tutorials/rosenbrock1f.F90.html">src/tao/unconstrained/examples/tutorials/rosenbrock1f.F90.html</A><BR>
<BR><A HREF="./index.html">Index of all Tao routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
</BODY></HTML>
|
