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I would like to save Feyncalc outputs in a notebook and be able to manipulate them as Feyncal expressions even after re-starting Feyncal or Mathematica.

The problem I have is this. Say my output is

g^{ab} p^2 - p^a p^b

which is of course

MetricTensor[a,b] ScalarProduct[p,p] - FourVector[p,a] FourVector[p,b]

However, I notice that after re-starting Mathematica, starting Feyncal and then loading the notebook that contains the above expression, these expressions do not get treated like Feyncalc outputs. For instance

In: g^{ab} g^{cd}

Out: g^{ab+cd}

Is there anything I could do to make Mathematica recognize these expressions as Feyncalc output so I don't need to re-generate them from scratch?

Thanks!

**Next message:**Frederik Orellana: "Re: How to manipulate saved expressions in a notebook"**Previous message:**Rolf Mertig: "Re: BUG with Gluon propagator ????"**Next in thread:**Frederik Orellana: "Re: How to manipulate saved expressions in a notebook"**Reply:**Frederik Orellana: "Re: How to manipulate saved expressions in a notebook"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

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