ufl team mailing list archive

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

Quoting Anders Logg <logg@xxxxxxxxx>:

> I thought about it some more and I think I might be able to generate
> the indices on the fly as part of the monomial extraction so it might
> not be necessary.
> 
> So if it's not needed for quadrature it can be part of the monomial
> extraction. Otherwise, it seems pretty simple to make a transformer
> for index renumbering.

I don't think index renumbering is needed for quadrature. A thing that is
needed, however, is the component number of functions/basisfunctions but is this
alway represented by index?

Kristian
 
> -- 
> Anders
> 
> 
> On Sun, Feb 22, 2009 at 10:35:06AM +0100, Martin Sandve Alnæs wrote:
> > No, index renumbering isn't implemented.
> > And basis function indices are nonexisting,
> > I didn't think we needed them but maybe
> > you do for the tensor representation.
> > Lets discuss it next week.
> > 
> > Martin
> > 
> > 
> > 
> > On Sat, Feb 21, 2009 at 9:24 PM, Anders Logg <logg@xxxxxxxxx> wrote:
> > > Is index renumbering implemented in UFL? I'd like to renumber all
> > > indices in a form such that the first index starts at zero. I'd also
> > > like to be able to have separate index types/flags for argument basis
> > > functions and other indices.
> > >
> > > For Poisson, FFC renumbers from
> > >
> > >  (dXa10/dx0)(dXa11/dx0) | ((d/dXa10)vi-2)*((d/dXa11)vi-1)*dX(0) +
> > >  (dXa12/dx1)(dXa13/dx1) | ((d/dXa12)vi-2)*((d/dXa13)vi-1)*dX(0)
> > >
> > > to
> > >
> > >  (dXa0/dx0)(dXa1/dx0) | ((d/dXa0)vi0)*((d/dXa1)vi1)*dX(0) +
> > >  (dXa0/dx1)(dXa1/dx1) | ((d/dXa0)vi0)*((d/dXa1)vi1)*dX(0)
> > >
> > >
> > > -----BEGIN PGP SIGNATURE-----
> > > Version: GnuPG v1.4.9 (GNU/Linux)
> > >
> > > iEYEARECAAYFAkmgYxEACgkQTuwUCDsYZdEMCACfbxiYdEQrXpr9Ex5axYMqQ/Ja
> > > PbAAnjPaJkzuhXyEwBxKnDi1peZrKx+Y
> > > =OyGI
> > > -----END PGP SIGNATURE-----
> > >
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