Yes, I'm capable of looking them up. I was only pointing out which equations were hit upon during my education.
Actually, one thing your post made me realize is that I did touch upon equation 6 in a fourth year algorithms class. I didn't know it as related to polyhedra, as we used it in relation to vertices, edges, and faces in complexity analysis of geometric algorithms.
For example, a cube: 6 faces, 8 vertices, 12 edges: http://en.wikipedia.org/wiki/Euler_characteristic
15 is this: http://en.wikipedia.org/wiki/Information_entropy#Definition
16 is kind of a cop out to call it "Chaos", it's one specific case, this: http://en.wikipedia.org/wiki/Logistic_map
17 is in Finance: http://en.wikipedia.org/wiki/Black_scholes_formula#Black.E2....