[Insight-users] difference between vector and covariantvector

[Luis Ibanez]

Hi Jeroen,

Thanks for the correction.

My statement about the orthogonal matrix was indeed incorrect.


   Regards,


      Luis


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> 
>>   In the case of rigid rotations, the matrix is orthogonal and
>>   therefore it is equal to its inverse, so the effect is not
>>   noticeable.
> 
> 
> The inverse of an orthogonal matrix is its transpose, which in general
> not equal to the original matrix. Just write down a 2D rotation matrix, to convince yourself.
> 
> best,
> Jeroen
> 
> 
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