On Tue, 30 Jun 2009 13:51:15 -0600
Charles R Harris wrote:
> On Tue, Jun 30, 2009 at 12:26 PM, Nils Wagner
> wrote:
>
>> On Tue, 30 Jun 2009 11:10:39 -0600
>> Charles R Harris wrote:
>> > On Tue, Jun 30, 2009 at 10:56 AM, Charles R Harris <
>> > charlesr.har...@gmail.com> wrote:
>> >
>> >>
>
On Tue, Jun 30, 2009 at 2:02 PM, David Goldsmith wrote:
>
> 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 permutations of
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
--- On Tue, 6/30/09, Nils Wagner wrote:
> From: Nils Wagner
> Subject: Re: [Numpy-discussion] permutation symbo
On Tue, Jun 30, 2009 at 12:26 PM, Nils Wagner
wrote:
> On Tue, 30 Jun 2009 11:10:39 -0600
> Charles R Harris 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.
On Tue, Jun 30, 2009 at 12:30 PM, David Goldsmith
wrote:
>
> 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
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On Tue, 30 Jun 2009 11:30:51 -0700 (PDT)
David Goldsmith 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
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Num
On Tue, Jun 30, 2009 at 12:26 PM, Nils Wagner
wrote:
> On Tue, 30 Jun 2009 11:10:39 -0600
> Charles R Harris 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.
Great, Nils! Now, can you generalize it to N-D for us? ;-)
DG
--- On Tue, 6/30/09, Nils Wagner wrote:
> From: Nils Wagner
> Subject: Re: [Numpy-discussion] permutation symbol
> To: "Discussion of Numerical Python"
> Date: Tuesday, June 30, 2009, 11:26 AM
> On
, isn't this "just" a tensor product with one
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 wrote:
> From: Charles R Harris
> Subject: Re: [Numpy-discussion] permutation symbol
>
On Tue, 30 Jun 2009 11:10:39 -0600
Charles R Harris 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 -0600
>>>
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 wrote:
>> > On Tue, Jun 30, 2009 at 5:11 AM, Nils Wagner
On Tue, Jun 30, 2009 at 10:40 AM, Nils Wagner
wrote:
> On Tue, 30 Jun 2009 10:27:05 -0600
> Charles R Harris wrote:
> > On Tue, Jun 30, 2009 at 5:11 AM, Nils Wagner
> > wrote:
> >
> >> On Tue, 30 Jun 2009 11:22:34 +0200
> >> "Nils Wagner" wrote:
> >>
> >>> Hi all,
> >>>
> >>> How can I build
On Tue, 30 Jun 2009 10:27:05 -0600
Charles R Harris wrote:
> On Tue, Jun 30, 2009 at 5:11 AM, Nils Wagner
> wrote:
>
>> On Tue, 30 Jun 2009 11:22:34 +0200
>> "Nils Wagner" wrote:
>>
>>> Hi all,
>>>
>>> How can I build the following product with numpy
>>>
>>> q_i = \varepsilon_{ijk} q_{kj}
>>
On Tue, Jun 30, 2009 at 5:11 AM, Nils Wagner
wrote:
> On Tue, 30 Jun 2009 11:22:34 +0200
> "Nils Wagner" 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
>>
>
On Tue, 30 Jun 2009 11:22:34 +0200
"Nils Wagner" 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-Civ
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
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