Legendre Funcs: Homework & Equations Explained

[G4CKT]

Homework Statement

Hi everyone, I am having issues understanding how Legendre functions work especially the recursion and what the subscripts mean in general. I am attempting to make a program to compute the legendre functions P_nm(cos(theta)) and the normalized version and then verifying it by plotting 4 normalized legendre functions.

I don't understand what to do with these equations to get to what I'm attempting to do they just confuse me to no end.

Homework Equations

http://img14.imageshack.us/img14/5976/legendre.png

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I'm pretty sure I have to make a function to start with the original equation and then recursively go down. What do the subscripted n/m mean I'm confused on that as well xD

 

[G4CKT]

Bump

xD