[Trilinos-Users] Thyra Linear Operator: Define operators with different types input/output

[Einar Otnes]

Ross,
Thank you for this. This sounds reasonable. 

I gather that I will have to implement the deprecated function applyTranspose(...)  as well to make the distinction between the different types being input to apply(...) and applyTranspose(....)?

Thanks,
Einar


On Mar 12, 2012, at 6:09 PM, Bartlett, Roscoe A. wrote:

> Einar,
> 
> We removed the ability to support mixed scalar types because it massively complicated the software with no real value (at least not in the last 6 years or so).  If you need to support mixed scales types (i.e. real domain and complex range), you can do that by creating your own dual-templated linear operator interface.  If you just copy and paste the files Thyra_LinearOpBase*pp you should be able to create a double-templated interface pretty fast and then create your own concrete subclass.  We may add an extended interface for a dual-templated Thyra Linear Operator interface but we need to have one of our major driving customers that requires this.  There is actually a bit of software in Thyra (both interfaces and some concrete implementations) to help support translating between vectors and multi-vectors of different scalar types that could be used to help implement such software.
> 
> Does this sound reasonable?
> 
> -Ross
> 
> 
>> -----Original Message-----
>> From: trilinos-users-bounces at software.sandia.gov [mailto:trilinos-users-
>> bounces at software.sandia.gov] On Behalf Of Einar Otnes
>> Sent: Sunday, March 11, 2012 6:39 AM
>> To: trilinos-users at software.sandia.gov
>> Subject: [Trilinos-Users] Thyra Linear Operator: Define operators with
>> different types input/output
>> 
>> Dear expert,
>> A rather basic question: How would you define an operator in Thyra that
>> brings you from a domain with one type to a range with a different type, e.g.
>> a real to complex Fourier transform?
>> I've found some examples of this for earlier versions of Trilinos where you
>> could provide more than one template parameter in
>> Thyra::LinearOpBaseWithSolver. With the latest releases, this is not possible
>> any longer as there is only one template parameter for the linear operators.
>> Any advice?
>> 
>> Thanks,
>> 
>> Einar
>> 
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>