ufl team mailing list archive

[Kristian Oelgaard <k.b.oelgaard@xxxxxxxxxx>]

Quoting Anders Logg <logg@xxxxxxxxx>:

> I tried to use the new UFL function estimate_max_polynomial_degree
> but the results seem to be incorrect for quadrature representation.
> (Or the references are wrong which I doubt.)
>
> Kristian, can you take a look at this?
>
> Try running the test in simple_verify_tensors. It reports the
> following errors:
>
> FunctionOperatorsBilinearForm_cell_integral_0:      *** (diff = 0.010098)
> MassBilinearForm_cell_integral_0:                   *** (diff = 1e-09)
> NeumannProblemLinearForm_cell_integral_0:           *** (diff = 0.0029685)

This difference is because:
element = VectorElement("Lagrange", triangle, 1)

v = TestFunction(element)
f = Function(element)
L = inner(v, f)*dx

results in:
Input form: { sum_{i_0} ((v_0)[i_0]) * ((w_0)[i_0])  } *
dx0<{'ffc_representation': 'tensor', 'quadrature_order': 1}>

where the quadrature order should be 2.

The tensor representation computes the degree elsewhere (which is 2) as far as I
can tell from using the -d1 option.

Kristian

> NeumannProblemLinearForm_exterior_facet_integral_0: *** (diff = 0.00292)
> OptimizationBilinearForm_cell_integral_0:           *** (diff = 2.19169)
> PoissonDGBilinearForm_interior_facet_integral_0:    *** (diff = 0.3504)
> PoissonSystemLinearForm_cell_integral_0:            *** (diff = 0.0029685)
> QuadratureElementBilinearForm_cell_integral_0:      *** (diff = 0.249892)
> QuadratureElementLinearForm_cell_integral_0:        *** (diff = 0.10106)
> StokesLinearForm_cell_integral_0:                   *** (diff = 0.00140453)
>
> --
> Anders
>
>
> On Sun, Apr 19, 2009 at 06:23:03PM +0200, FFC wrote:
> > One or more new changesets pushed to the primary ffc repository.
> > A short summary of the last three changesets is included below.
> >
> > changeset:   1497:38268dcd85de2bfcae1094ed96ea584293320491
> > tag:         tip
> > user:        Anders Logg <logg@xxxxxxxxx>
> > date:        Sun Apr 19 18:23:00 2009 +0200
> > files:       ffc/compiler/uflcompiler.py
> > description:
> > Use new UFL function estimate_max_polynomial_degree to estimate quadrature
> > degree. Seems to give wrong results for quadrature representation.
> >
> >
> > changeset:   1496:2eaeb80e1d1fdf45208005bd1cc23016ca872919
> > user:        "Garth N. Wells <gnw20@xxxxxxxxx>"
> > date:        Sun Apr 19 14:26:22 2009 +0800
> > files:       ffc/compiler/uflcompiler.py
> > description:
> > Fix silly error.
> >
> >
> > changeset:   1495:4710241c0954645d8150ec6fcd1eb3bff4f6d333
> > user:        "Garth N. Wells <gnw20@xxxxxxxxx>"
> > date:        Sun Apr 19 13:47:10 2009 +0800
> > files:       ffc/compiler/uflcompiler.py
> > description:
> > Small fix.
> >
> > ----------------------------------------------------------------------
> > For more details, visit http://www.fenics.org/hg/ffc
> > _______________________________________________
> > FFC-dev mailing list
> > FFC-dev@xxxxxxxxxx
> > http://www.fenics.org/mailman/listinfo/ffc-dev
>