[Trilinos-Users] Epetra_SerialDenseVector vs. Teuchos::SerialDenseVector

[Nico Schlömer]

> Thus any further development of the SerialDense classes will be done in
Teuchos,

Suggestion for the further development: Adding

  operator+
  operator-

and scalar multiplication. This is now all possible with operator+= and
friends, but I just had to evaluate an expression 'a la

   y = alpha * x1 + beta * x2 + gamma * x3 + delta * x4

where the x{1,2,3,4} are SerialDenseVectors, alpha,.. are scalars and
found the only way to do so

SerialDenseVector y;
x *= alpha;
y += x;
[...]

The code for the new operators would rather go in SerialDense~Matrix~,
though, I guess.

Cheers,
Nico



On Tue, 27 Jul 2010 11:20:35 -0600, "Thornquist, Heidi K"
<hkthorn at sandia.gov> wrote:
> Hi Nico,
> 
> There has been some work to add functionality in Teuchos to support the
use
> of Teuchos::SerialDenseVector with Teuchos::SerialDenseMatrix.  This
> functionality
> was in support of Dakota's use of Teuchos::SerialDenseVector.  Thus any
> further
> development of the SerialDense classes will be done in Teuchos, probably
> not in
> Epetra.
> 
> Heidi
> 
> 
> On 7/27/10 11:10 AM, "Heroux, Michael A" <maherou at sandia.gov> wrote:
> 
> Nico,
> 
> My advice is that, if there is functionality overlap between Epetra and
> Teuchos, you should use Teuchos.  Historically, we have migrated a lot
of
> Epetra functionality into Teuchos, generalizing it as part of the
> migration.
> This is what happened in this case.
> 
> Mike
> 
> 
> On 7/27/10 12:00 PM, "Christopher Grover Baker" <bakercg at ornl.gov>
wrote:
> 
>> Nico,
>>
>> Aside from the fact that Teuchos::SerialDenseVector is templated on the
>> underlying scalar type and Epetra_SerialDenseVector is hard-coded to
>> double,
>> there should not be much difference between the two. The Epetra object
>> will
>> see little use outside of Epetra, while the Teuchos object will be used
>> by
>> templated packages. Although, to be honest, I can't think of any use of
>> Teuchos::SerialDenseVector in any of the templated packages that I work
>> on
>> (including Tpetra).
>>
>> Chris
>>
>>
>> On 7/27/10 12:10 PM, "Nico Schlömer" <nico.schloemer at ua.ac.be> wrote:
>>
>> Hi all,
>>
>> I just saw that for the Epetra_SerialDenseVector class I've always used
>> there seems to be an equivalent in Teuchos::SerialDenseVector.
>>
>> Is the use of one of the two classes recommended over the other?
>>
>> Cheers,
>> Nico
>>
>>
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