# Optimal control in space-time (t,x,y) with BFGS

**URL:** https://community.freefem.org/t/optimal-control-in-space-time-t-x-y-with-bfgs/2119
**Category:** General Discussion
**Created:** [November 15, 2022, 12:14pm UTC](https://community.freefem.org/t/optimal-control-in-space-time-t-x-y-with-bfgs/2119 "2022-11-15T12:14:41Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![lassounon](https://avatars.discourse-cdn.com/v4/letter/l/bbe5ce/32.png) [@lassounon](https://community.freefem.org/u/lassounon)
#### Post date: [November 15, 2022, 12:14pm UTC](https://community.freefem.org/t/optimal-control-in-space-time-t-x-y-with-bfgs/2119/1 "2022-11-15T12:14:41Z")

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Hello,  
I would like to know where I should call BFGS, since my optimal control for parameter (t,x,y) is it inside the time loop that I define BFGS ?

Thanks