[Numpy-discussion] permutation symbol
Nils Wagner
nwagner at iam.uni-stuttgart.de
Tue Jun 30 07:11:58 EDT 2009
On Tue, 30 Jun 2009 11:22:34 +0200
"Nils Wagner" <nwagner at iam.uni-stuttgart.de> wrote:
> Hi all,
>
> How can I build the following product with numpy
>
> q_i = \varepsilon_{ijk} q_{kj}
>
> where \varepsilon_{ijk} denotes the permutation symbol.
>
> Nils
Sorry for replying to myself.
The permutation symbol is also known as the Levi-Civita
symbol.
I found an explicit expression at
http://en.wikipedia.org/wiki/Levi-Civita_symbol
How do I build the product of the Levi-Civita symbol
\varepsilon_{ijk} and the two dimensional array
q_{kj}, i,j,k = 1,2,3 ?
Nils
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