I'm building a simple Android 2D game on my free time which involves some maths (ball bouncing, colliding algorithms, ..), what I would really like is some refr

I'm building a simple Android 2D game on my free time which involves some maths (ball bouncing, colliding algorithms, ..), what I would really like is some refresh of Linear Algebra (Vectors, Projections, ...) and Physics that I may easily apply to the game itself. How may I contact you? I can't see any contact details on your profile.