Inductive Load

Found this thank's to Inductive Load doing a wiki thing on Penrose Tiling. It's the real part of a comlex equation (x = R + yi) these are used (among many other things) to solve quadratic equations with a negative solution requiring a square root taken. Think back to Math classes! The equation describes spherical harmonics - like standing waves but in 3D through a sphere. The colours are yellow positive, blue negative. It was mapped using Mathematica and I found it on http://commons.wikimedia.org/wiki/User:Inductiveload/Gallery