I have a question, at this looks like the most likely place to get an answer. My son wrote an equation on his wall when he was 8 yrs old. He has a learning disability, and could not know this kind of math... Dr. Claude Swanson is working on it right now, but I was hoping someone else could help me dicipher it too. Something to do with Bessel functions? I do not knw what that means. I have been told the first line is simple, but I do not understand this type of math (a + bi) * ( a- bi) = a^2 + b^2 then there is a lot of stuff that I really do not understand... Hnm = J* Sn Sm = Psi = A [Jm (kr)+rhom (k) Ym (kr)] does this make sense to anyone??????? Any help would be appreciated.