Name: Tomas Brauner (email_not_shown)
Date: 06/21/11-01:46:29 PM Z


Hello,

is there some way to uncontract indices in tensor functions? Uncontract with Pair->All seems to only work for scalar products of vectors. Here is an example:

Contract[TensorFunction[t, a, b] FV[p, b]];
Uncontract[%, p, Pair -> All]

gives t(a,p). I did not find a way to separate the tensor from the vector once they are contracted unless I explicitly perform a replacement on the full form, something like:

t[LorentzIndex[a_],Momentum[p_]]->TensorFunction[t,a,b]FV[p,b]

Is there some more straightforward and systematic way to do this?
Thanks!

Tomas Brauner



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