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Re: Dot product confusion


Hello,
your assumptions seem to be wrong.
The dot product in Mathematica isn't just "the inner product, but the
matrix product, in your case
ptsa*v or v*ptsa.
In the first case v is considered as column vector, in the second one as
row vector.
Matrix products are rarely abelian.

Alois

-- 
Alois Steindl,                           Tel.: +43 (1) 58801 / 32558      
Inst. for Mechanics and Mechatronics     Fax.: +43 (1) 58801 / 32598
Vienna University of Technology,         A-1040 Wiedner Hauptstr. 8-10   


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