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defining an implicit function

Posted 10 years ago
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I'd like to do some GR calculations with the Kruskal-Szekeres coordinates and the Schwartzchild metric (or other metrics). I have the RGTC package, but I don't know how to define the metric with r, which is an implicit function of u and v (r/2M-1) Exp[r/2M]=u^2-v^2. Any way to define implicit functions in Mathematica?
POSTED BY: Iuval Clejan
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