Recent content by ibyea

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    Why Don't First-Order Terms Disappear in the Taylor Expansion for Scalar Fields?

    Thanks! Good to know I wasn't just being too dumb to see the obvious.
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    Why Don't First-Order Terms Disappear in the Taylor Expansion for Scalar Fields?

    Homework Statement Page 35 of Jackson's Electrodynamics (3rd ed), it gives the following equation (basically trying to prove your standard 1/r potential is a solution to Poisson equation): \nabla^2 \Phi_a = \frac{ -1 }{ \epsilon_0 } \int \frac{ a^2 }{( r^2 + a^2)^{5/2} } \rho( \boldsymbol{x'}...