dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Tue, Jun 09, 2009 at 05:11:48PM -0500, Jehanzeb Hameed wrote:
> Hello,
> 
> Is there a builtin function in dolfin to compute L^2 or H_1 norms? If
> so, can you please point it out. If not, are there support functions
> (e.g. a Gauss Quadrature table, computation of Jacobians, etc) which
> can help in this?

Yes, this is available in the DOLFIN Python interface:

  norm(v)

The default computes the L^2 norm. Several options are available:

  L^2:     norm(v, 'L2')
  H^1:     norm(v, 'H1')      includes L^2 term
  H^1_0:   norm(v, 'H10')     does not include L^2 term
  H(div):  norm(v, 'Hdiv')    includes L^2 term
  H(div):  norm(v, 'Hdiv0')   does not include L^2 term
  H(curl): norm(v, 'Hcurl')   includes L^2 term
  H(curl): norm(v, 'Hcurl0')  does not include L^2 term

-- 
Anders

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