On Thu, Jan 28, 2010 at 12:23 PM, Vinzent Steinberg
<vinzent.steinb...@googlemail.com> wrote:
> Tensors could be also a great project, given that I heard that many
> are complaining about Mathematica's implementation.
>
> Also see http://code.google.com/p/sympy/issues/detail?id=16 for this.

Yes, together with special and general relativity stuff, like the
Lorentz matrix etc. So that one can write some tensor in a local
inertial frame, like

T^\mu\nu = diag(rho*c^2, p, p, p)

and get it automatically transformed into some other frame using the
Lorentz transformation:

T^\mu\nu = (rho + p/c^2)u^\mu u^\nu + p g^\mu\nu

see here:

http://certik.github.com/theoretical-physics/book/src/fluid-dynamics/general.html#perfect-fluids

it'd be nice to play with such things in sympy.

Ondrej

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