Name: V. Shtabovenko (email_not_shown)
Date: 12/17/17-09:50:21 PM Z

You can do something like

ScalarProduct[p, q] /.
  FCI[SP[p, q]] -> {p1, p2, p3, p4}.{q1, -q2, -q3, -q4}

but in general FeynCalc works with Lorentz invariant quantities, not
single components of 4-vectors.

Am 11.12.2017 um 21:40 schrieb Karaki:
> I have a formula M^{\mu\nu} and want to contract it with a four-vector p_\mu. I know the components of p_\mu. How do I do this contraction?

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