21 May
2018
21 May
'18
3:13 p.m.
On 21/05/18 15:50, Matthew Knepley wrote:
On Mon, May 21, 2018 at 10:48 AM, Lawrence Mitchell <lawrence.mitchell@imperial.ac.uk <mailto:lawrence.mitchell@imperial.ac.uk>> wrote:
On 21/05/18 14:50, Matthew Knepley wrote: > This should do the 1-norm and the \infty-norm
errornorm (and norm, which it uses) compute the L^2 (H1, H(div), H(curl)) norms. Adding the p-norm:
||f||_p = (\int |f|^p dx)^(1/p)
is easy to do.
Great, I would take that.
The inf-norm is harder, because the the function is not contained in the hull defined by its piecewise linear interpolant at the nodes.
I thought you could get it by duality, but I am guessing I am wrong (maybe just a bound).
If you have a method, I'm all ears. Cheers, Lawrence