I’m saddened to learn about Prof. Walter Rudin’s death.
Though I’m never a formal math undergraduate and get the chance to walk through the classic analysis courses (such as mathematical analysis, complex analysis, functional analysis, Fourier analysis, whatsoever), I do enjoy reading Prof. Walter Rudin’s books on these subjects. I love most his succinct and elucidative writing style, which leads me to the perfect rigor of maths. Remember Prof. Walter Rudin, and listen to his mathematical trilogy!
(Info: NUS science bookstore gets reprints of all these three classic books, at decent prices. )