On Tue, 30 Jun 2009 13:51:15 -0600
Charles R Harris charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 12:26 PM, Nils Wagner
nwag...@iam.uni-stuttgart.dewrote:
On Tue, 30 Jun 2009 11:10:39 -0600
Charles R Harris charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 10:56 AM,
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
http://mathworld.wolfram.com/PermutationSymbol.html
___
Numpy-discussion mailing list
On Tue, 30 Jun 2009 11:22:34 +0200
Nils Wagner nwag...@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
On Tue, Jun 30, 2009 at 5:11 AM, Nils Wagner
nwag...@iam.uni-stuttgart.dewrote:
On Tue, 30 Jun 2009 11:22:34 +0200
Nils Wagner nwag...@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
On Tue, 30 Jun 2009 10:27:05 -0600
Charles R Harris charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 5:11 AM, Nils Wagner
nwag...@iam.uni-stuttgart.dewrote:
On Tue, 30 Jun 2009 11:22:34 +0200
Nils Wagner nwag...@iam.uni-stuttgart.de wrote:
Hi all,
How can I build the
On Tue, Jun 30, 2009 at 10:40 AM, Nils Wagner
nwag...@iam.uni-stuttgart.dewrote:
On Tue, 30 Jun 2009 10:27:05 -0600
Charles R Harris charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 5:11 AM, Nils Wagner
nwag...@iam.uni-stuttgart.dewrote:
On Tue, 30 Jun 2009 11:22:34 +0200
On Tue, Jun 30, 2009 at 10:56 AM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 10:40 AM, Nils Wagner
nwag...@iam.uni-stuttgart.de wrote:
On Tue, 30 Jun 2009 10:27:05 -0600
Charles R Harris charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 5:11 AM,
On Tue, 30 Jun 2009 11:10:39 -0600
Charles R Harris charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 10:56 AM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 10:40 AM, Nils Wagner
nwag...@iam.uni-stuttgart.de wrote:
On Tue, 30 Jun 2009 10:27:05
factor a constant tensor, and thus we could implement it that way using an
existing resource?
DG
--- On Tue, 6/30/09, Charles R Harris charlesr.har...@gmail.com wrote:
From: Charles R Harris charlesr.har...@gmail.com
Subject: Re: [Numpy-discussion] permutation symbol
To: Discussion of Numerical
Great, Nils! Now, can you generalize it to N-D for us? ;-)
DG
--- On Tue, 6/30/09, Nils Wagner nwag...@iam.uni-stuttgart.de wrote:
From: Nils Wagner nwag...@iam.uni-stuttgart.de
Subject: Re: [Numpy-discussion] permutation symbol
To: Discussion of Numerical Python numpy-discussion@scipy.org
On Tue, Jun 30, 2009 at 12:26 PM, Nils Wagner
nwag...@iam.uni-stuttgart.dewrote:
On Tue, 30 Jun 2009 11:10:39 -0600
Charles R Harris charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 10:56 AM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 10:40
On Tue, 30 Jun 2009 11:30:51 -0700 (PDT)
David Goldsmith d_l_goldsm...@yahoo.com wrote:
Great, Nils! Now, can you generalize it to N-D for us?
;-)
DG
Just curious - Do you have any application for N-D case in
mind ?
Nils
___
On Tue, Jun 30, 2009 at 12:30 PM, David Goldsmith
d_l_goldsm...@yahoo.comwrote:
Great, Nils! Now, can you generalize it to N-D for us? ;-)
It's generally better to use the exterior calculus, determinants, and
various other tricks.
Chuck
___
On Tue, Jun 30, 2009 at 12:26 PM, Nils Wagner
nwag...@iam.uni-stuttgart.dewrote:
On Tue, 30 Jun 2009 11:10:39 -0600
Charles R Harris charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 10:56 AM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Tue, Jun 30, 2009 at 10:40
: Re: [Numpy-discussion] permutation symbol
To: Discussion of Numerical Python numpy-discussion@scipy.org
Date: Tuesday, June 30, 2009, 11:50 AM
On Tue, 30 Jun 2009 11:30:51 -0700
(PDT)
David Goldsmith d_l_goldsm...@yahoo.com
wrote:
Great, Nils! Now, can you generalize it to N-D
for us
On Tue, Jun 30, 2009 at 2:02 PM, David Goldsmith d_l_goldsm...@yahoo.comwrote:
No, but my guess is that it might be useful in numerical General
Relativity, e.g., as well as pedagogically in teaching differential geometry
and tensor algebra.
DG
It shouldn't be difficult to generate all the
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