# Difference between revisions of "User:Erik"

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Web: [http://sl1200.org/~erik/ http://sl1200s.org/~erik/]<br> | Web: [http://sl1200.org/~erik/ http://sl1200s.org/~erik/]<br> | ||

IRC: [irc://frop.taphouse.org/ Taphouse Cabal] [irc://irc.efnet.org/ EFnet] [irc://chat.freenode.net/ The Freenode Network]<br> | IRC: [irc://frop.taphouse.org/ Taphouse Cabal] [irc://irc.efnet.org/ EFnet] [irc://chat.freenode.net/ The Freenode Network]<br> | ||

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<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> | <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> |