On Jun 1, 2011, at 11:17 AM, Roy Stogner wrote:
> I get O(h^4)/O(h^3) L2/H1 convergence in ex14 after changing that to
> HERMITE/3...
Indeed... I just heard back from my post-doc and he had something wrong
with his MMS runs he fixed it and now he's getting the correct order ;-)
"Never a
On Wed, 1 Jun 2011, Derek Gaston wrote:
> Not sure on that point but we're not getting the convergence
> rate we should for a simple scalar poisson problem so there is
> something going on there.
I get O(h^4)/O(h^3) L2/H1 convergence in ex14 after changing that to
HERMITE/3...
although
On Jun 1, 2011, at 9:12 AM, Dmitry Karpeev wrote:
> What is the asymptotic accuracy mixed discretization of a fourth-order
> PDE with a second order Lagrange basis?
> Not to say that there isn't a problem with Hermite, but it seems to me
> that this split lagrange space is richer than
> Hermite, s
What is the asymptotic accuracy mixed discretization of a fourth-order
PDE with a second order Lagrange basis?
Not to say that there isn't a problem with Hermite, but it seems to me
that this split lagrange space is richer than
Hermite, so it should have at least the same accuracy (or better).
Dmi
On Jun 1, 2011, at 8:28 AM, Jed Brown wrote:
> On Wed, Jun 1, 2011 at 15:38, Derek Gaston wrote:
> Has anyone done any MMS verification on cubic hermite convergence rates? I
> thought they were supposed to be O(h^4) but we're only seeing O(h^2) on a
> fairly simple 2D poisson problem with
On Wed, Jun 1, 2011 at 15:38, Derek Gaston wrote:
> Has anyone done any MMS verification on cubic hermite convergence rates? I
> thought they were supposed to be O(h^4) but we're only seeing O(h^2) on
> a fairly simple 2D poisson problem with an assumed solution of
> u=sin(8*pi*x).
Are you
On Wed, 1 Jun 2011, Derek Gaston wrote:
> Has anyone done any MMS verification on cubic hermite convergence rates?
Yes, but not in several years; it's entirely possible there's a
regression.
I'll give it a try to double-check this afternoon.
Of course, the long-term solution remains the same:
Has anyone done any MMS verification on cubic hermite convergence rates? I
thought they were supposed to be O(h^4) but we're only seeing O(h^2) on a
fairly simple 2D poisson problem with an assumed solution of u=sin(8*pi*x).
We started investigating this because we were doing some compariso
