Kasper Peeters whom the readers of this blog know as a co-author of the most cited 2005 paper about loop quantum gravity - a paper that has unfortunately shown that loop quantum gravity can't be useful for physics in its present form - has created a rather impressive symbolic computer algebra system to solve field theory problems.
- hep-th/0701238 (manual)
- cs.SC/0608005 (for IT people)
that shouldn't be confused with the Abracadabra website. :-) Both the input and the output is a subset of TeX and it allows you to manipulate with expressions involving tensors, derivatives, Grassmann variables, and gamma matrices, among other things.
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