[firedrake] parallel weirdness

[Cotter, Colin J]

Yes, that's what is weird.

--cjc
________________________________________
From: firedrake-bounces at imperial.ac.uk [firedrake-bounces at imperial.ac.uk] on behalf of Lawrence Mitchell [lawrence.mitchell at imperial.ac.uk]
Sent: 20 November 2014 08:59
To: firedrake
Subject: Re: [firedrake] parallel weirdness

On 20 Nov 2014, at 07:32, Colin Cotter <colin.cotter at imperial.ac.uk> wrote:

> Hi Lawrence,
>    Why does that term change the Krylov space? It's either added in ures, or in that line.
> Cjc

So it's possible I didn't manage to unpick what's going on there properly.  So I search in the space

span{r_0, A r_0, ...}

Where A is the velocity mass matrix and r_0 the initial residual.  So if I change Lures to remove this div term, I thought that maybe r_0 would change.  But are you saying it's come in from the initial guess in that case (because you've just moved it around)?

Lawrence
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