User:Tohline/Math/EQ TRApproximation

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LSU Key.png

<math>~\Phi_\mathrm{TR}(\varpi,z)</math>

<math>~=</math>

<math>~-\biggl[ \frac{2GM}{\pi } \biggr]\frac{K(k)}{\sqrt{(\varpi+a)^2 + z^2}}</math>

<math>\mathrm{where:}~~~k \equiv \{4a\varpi /[ (\varpi+a)^2 + z^2]\}^{1 / 2}</math>