# Set krylov linear solver paramters in newton solver

**URL:** <https://fenicsproject.discourse.group/t/set-krylov-linear-solver-paramters-in-newton-solver/1070>\
**Category:** variational formulation\
**Created:** [June 27, 2019, 1:17am UTC](https://fenicsproject.discourse.group/t/set-krylov-linear-solver-paramters-in-newton-solver/1070 "2019-06-27T01:17:46Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![georgexxu](https://avatars.discourse-cdn.com/v4/letter/g/e8c25b/32.png) [@georgexxu](https://fenicsproject.discourse.group/u/georgexxu)\
**Post date:** [July 25, 2020, 7:24pm UTC](https://fenicsproject.discourse.group/t/set-krylov-linear-solver-paramters-in-newton-solver/1070/8 "2020-07-25T19:24:46Z")

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Hi, Nate. Thanks for the explanation. I would like to add a separate preconditioner to my newton solver, however, I am not sure how to pass the P into the Newton Solver as shown in the poisson demo. Do have know how this can be done? Thank you in advance!

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