[firedrake] hybridisation and tensor-product multigrid

[Marie E. Rognes]

I'd be happy to discuss more today. (I need a little more detail to understand the question.) 

--
Marie

> On 16 Mar 2015, at 08:48, Colin Cotter <colin.cotter at imperial.ac.uk> wrote:
> 
> To make this work, you need to consistently choose "+" or "-" for the normal. Is it the convention that positive H(div) basis coefficient leads to positive value of u.n("+")? I guess this is the real question I wanted to ask Marie yesterday, but hadn't formulated it right in my head.