[Dune] Multiplication of BCRS Matrix with Dynamic Vector

[Jö Fahlke]

Am Sat,  3. Sep 2011, 15:08:18 +0200 schrieb S. Swayamjyoti:
> Is it possible to multiply a BCRS matrix with a Dynamic Vector? When I try
> the standard mv opearation, I get an error
> saying,*/home/sj/dune/dune-common/dune/common/densematrix.hh:397:
> error: subscripted
> value is neither array nor pointer*.
> 
> Is there a work around? I would not want to change my Dynamic Vector to a
> Block Vector or Field Vector!

Well, you'll have to use a BlockVector or do the multiplication by hand.  The
matrix/vector opertions assume the matrix and the vector have a compatible
blocking structure (which is a sensible assumption).  If you call the blocking
depth of the basic matrices/vector 1 (FieldVector, DynamicVector,
FieldMatrix), then a BCRSMatrix has a minimum blocking depth of 2.

So not only do you have incompatible blocking structure, you also have
incomptible blocking depth!

Bye,
Jö.

-- 
The irony is that Bill Gates claims to be making a stable operating
system and Linus Torvalds claims to be trying to take over the world.
-- seen on the net
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