Being on holiday now I am spending a couple of hours a day studying Sydsaeter and Hammond’s Mathematics for Economic Analysis (Prentice-Hall, 1995). I do my best to dig deeper in the theory and practice of mathematical analysis from multivariate optimization to matrix algebra. For an economist mathematics can never be enough so it is worthwhile for one to deepen his knowledge of maths. So I can discover the beauty of mathematical analysis again. It is fun.