Starting Point

My goal is to make a collection of little things about mathematics familiar for most physics students that i found interesting. Some of the issues will be trivial, others are merelly academic and a few could be a little harder. This blog will be like the bunch of papers that grows in the closet because it dont fit in any classified file folder. I have some things i wrote a long time ago so maybe you find some stuff funny for younger minds.
Please mail me the english errors i make so i can learn and correct. Of course, if you find any algebraic incorrection, want any explanation or want to give a suggestion send it by mail...

cdanielabr@netcabo.pt