Introduction There are too many paper napkins in America. There are paper napkins and plastic knifes and plastic forks and plastic spoons in PSU. I can use them anytime. When I came PSU’s cafeteria I was surprised by that. For this project I chose to res...
Chapter 1 Sturm’s Theorem 1.1 Sturm’s Thorem Definition 1.1 We define that the number of changed sign V (a1, · · · , an) for a = 1, · · · , an ∈ R is as follows. For the sequense (a1, · · ·...