[Pw_forum] ATLAS DSYGVX problem + mailing list question

[Riccardo Di Meo]

Paolo Giannozzi wrote:
> Riccardo Di Meo wrote:
>
>   
>> It seems therefore that the culprit is the line:
>>
>>      nb = ILAENV( 1, 'DSYTRD', 'U', n, -1, -1, -1 )
>>
>> which produces two different results with the same input, although I 
>> don't know why.
>>     
>
> ILAENV is a Lapack auxiliary routine. The Atlas version of ILAENV
> should return the value of nb that is most suited to the Atlas
> version of Lapack. Apparently it doesn't even return a correct
> value. Not a QE problem, apparently.
>
> P.
>   
Thank you for the explanation: it seems indeed a lapack/atlas problem.

I'll look a bit into it, and post if I'll find something of some use.

Best regards,
Riccardo