Is solving a Nx * Ny system equivalent to a Nx * Ny * 1 system in PETSc?

[Wee-Beng TAY]

Hi Barry,

That's just what I'm thinking!

Thank you very much and have a nice day!

Yours sincerely,

Wee-Beng Tay



Barry Smith wrote:
>
>    Speed should be pretty much the same.
>
>    I could interpret your question as: If one as a 3d PDE solver is it 
> worth writing a totally separate 2d code or can one just run the 3d 
> code with 2 dimensions? My answer to this question is, since code 
> development and maintenance is very time-consuming it makes sense to 
> just have one code.
>
>    Barry
>
> On Oct 14, 2009, at 10:43 AM, Wee-Beng TAY wrote:
>
>> Hi,
>>
>> I'm not sure if my question is trivial but I'm wondering if it makes 
>> any difference in solving a Nx * Ny system and a Nx * Ny * 1 system 
>> in PETSc? For e.g., 10x10 vs. 10x10x1. Will there be any problem or 
>> difference in answer? What about the speed?
>>
>> -- 
>> Thank you very much and have a nice day!
>>
>> Yours sincerely,
>>
>> Wee-Beng Tay
>>
>
>