Dear Freshmen!

Through this work we've tried to help you discover some of the main concepts that you are going to use in the first semester as freshmen in the National Higher School of Mathematics. This work doesn't cover all the chapters since we had created it even before the first semester came to its end. Additionally, we did our best to avoid "rewriting" the lectures , as well, not to give shallow definitions or examples. which is kind of hard mission . Even though, if this work help you in any way, then we will be very grateful :) Break a leg ! Team members (all from group B1) :