**petsc-3.11.4 2019-09-28**

# TAOLMVM

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

### Options Database Keys

**-tao_lmvm_recycle ** -enable recycling LMVM updates between TaoSolve() calls

**-tao_lmvm_no_scale ** -(developer) disables diagonal Broyden scaling on the LMVM approximation

### Level

beginner

### Location

src/tao/unconstrained/impls/lmvm/lmvm.c
### Examples

src/tao/unconstrained/examples/tutorials/eptorsion1.c.html

src/tao/unconstrained/examples/tutorials/rosenbrock1.c.html

src/tao/unconstrained/examples/tutorials/rosenbrock1f.F90.html

Index of all Tao routines

Table of Contents for all manual pages

Index of all manual pages