Recent content by motlking

Thanks a lot Daniel :redface: I feel a little silly, anyway wish me luck for my exam tomorrow! :approve:

Hey guys, I am studying atm and looking at this book: "Introduction to Hilbert Space" by N.Young. For those who have the book, I am referring to pg 32, theorem 4.4. Theorem If x1,...,xn is an orthogonal system in an inner product space then, ||Sum(j=1 to n) xj ||^2 = Sum(j=1 to...