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A Hyperbolic Metric

The Poincare half-plane model for hyperbolic space puts the following metric on the plane:

ds2=1y2(dx2+dy2).ds^2 = \frac{1}{y^2} (dx^2 + dy^2).

Compute the Ricci scalar RR for this metric in matrix form. Is this a vacuum solution to Einstein's equations?

Give your answer as an (R,(R, Yes/No)) pair.


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