# User:Erik

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Name: Erik Hanson

Web: http://sl1200s.org/~erik/

IRC: Taphouse Cabal EFnet The Freenode Network

<math>\phi_n(\kappa) = \frac{1}{4\pi^2\kappa^2} \int_0^\infty \frac{\sin(\kappa R)}{\kappa R} \frac{\partial}{\partial R}\left[R^2\frac{\partial D_n(R)}{\partial R}\right]\,dR</math>