Re: 回复： about combining the GMRES and smooth methods

[Lisandro Dalcin]

On 1/28/07, jiaxun hou <jiaxun_hou at yahoo.com.cn> wrote:
>
> But I already had another preconditioner. I want to study the behave of  the
> smooth method in the GMRES with my preconditioner. How can I do?
>  Thanks!

So perhaps it is better to use a composite preconditioner, calling
PCCreate(comm,&pc) and next PCSetType(pc, PCCOMPOSITE), and finally
add your preconditioner followed by the smoother...

I think your original approach was wrong, if you look at GMREScycle(),
you will see that this routine applies the PC inside each cycle.


-- 
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
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