Re: [Lapackpp-devel] Cross Product

[Christian S. <sti...@tu...>]

Dear Jack,

ok, I don't know about computer vision. However, in lapack this function 
does not seem to exist. Lapack http://www.netlib.org/lapack/lug/ is all 
about linear equations, linear least squares problems, eigenvalue 
problems and singular value problems. The vector cross product rather 
seems to belong to some totally different category, and thus there is no 
such code there. I'm afraid you have to live with your own implementation.

Christian

Jacob (Jack) Gryn schrieb:

> That's the one.
> 
> I implemented it myself, since it's not used in any loops, I don't really
> need the optimization of lapack.  However, if it is implemented in lapack, I
> think we should have a wrapper for lapack++.  I think it's used often enough
> in the computer vision world.
> 
> Jack
> 
> -----Original Message-----
> From: Christian Stimming [mailto:sti...@tu...] 
> Sent: Friday, November 26, 2004 4:31 AM
> To: Jacob (Jack) Gryn
> Cc: lap...@li...
> Subject: Re: [Lapackpp-devel] Cross Product
> 
> Dear Jack,
> 
> Jacob (Jack) Gryn schrieb:
> 
>>Is there a Cross Product defined in any of the Blass?++ libraries?
> 
> 
> Do you mean the cross product as explained here 
> http://mathworld.wolfram.com/CrossProduct.html which is a function of 
> R^3 x R^3 -> R^3
> ? No, this function is not available. From what I remember, the cross 
> product has so limited use in numerics that the numerical people 
> wouldn't implement such a function. But you are really looking for this 
> function?
> 
> Christian
> 
> 
> 
>