# PCD preconditioned

**URL:** <https://community.freefem.org/t/pcd-preconditioned/4222>\
**Category:** General Discussion\
**Created:** [February 19, 2026, 11:58pm UTC](https://community.freefem.org/t/pcd-preconditioned/4222 "2026-02-19T23:58:00Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![quentin](https://avatars.discourse-cdn.com/v4/letter/q/e47c2d/32.png) [@quentin](https://community.freefem.org/u/quentin)\
**Post date:** [March 2, 2026, 8:52am UTC](https://community.freefem.org/t/pcd-preconditioned/4222/4 "2026-03-02T08:52:10Z")

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As discussed in some previous posts, `fieldsplit` is a powerful tool through which you can specify each field with a certain solver. You can refer to [https://community.freefem.org/t/adapting-the-mal-preconditioner-to-stokes-fieldsplit-2d/4041/3](https://community.freefem.org/t/adapting-the-mal-preconditioner-to-stokes-fieldsplit-2d/4041/3)

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