[Dune] Notification from Dune

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A new Flyspray task has been opened.  Details are below.

User who did this: - Oliver Sander (sander)

Attached to Project - Dune
Summary - MCMGMapper not usable for P2 functions on prisms
Task Type - Bug Report
Category - Grid
Status - New
Assigned To - 
Operating System - All
Severity - Low
Priority - Normal
Reported Version - SVN
Due in Version - 
Due Date - Undecided
Details - Please apologize if the following is not a bug but a
feature.

There is a conceptual loophole in the
MultipleCodimMultipleGeomTypeMapper.  It allows
to attach degrees of freedom to subentities of elements.  So
supposedly this is the
method of choice when programming second-order Lagrangian finite
elements.  The 
implementations uses a Layout class, which, given a codimension and a
geometry type,
returns whether subentities of the given geometry type and of the
given codimension
have a dof or not.

Thus, for example, a mapper for P2 elements would return true for
codims 3 and 2 for
tetrahedra, and for codims 3,2,1,0 for hexahedra.  However, here's the
problem:
What happens with prisms and pyramids?  There, only some codim 1
entities (the quadrilaterals)
get a dof.  However, the interface of the Layout classes is too
restricted to be able
to convey this information.

More information can be found at the following URL:
http://hal.iwr.uni-heidelberg.de/flyspray/?do=details&id=178

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