Re: NEC-LIST: Symbolic evaluation of integrals

Happy New Year to you Malcolm,

I assume you've looked in the big Russian compilation, by Gradsteyn and
Ridzhykh, so I won't. I did look in Pierce and Foster's "A Short Table of
Integbrals", 4th ed., for related forms. There's no help even in the
definite integrals.

It occurs to me that
d(exp(-jkr))/dx = d((-jkr))/dr dr/dx
=-jk exp(-jkr) dr/dx = -jk exp(-jkr) x/r = -jk d( I_a.)/dx
so
I_a=exp(-jkr)/(-jk).

Am I missing something here?

Doug Miron

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