This book is a tribute to Paul Erdos, the wandering mathematician once described as the "prince of problem solvers and the absolute monarch of problem posers." It examines the legacy of open problems he left to the world after his death in 1996.
A book for mathematicians, full of open problems posed by Erdos. I brought it just to see with which topics Erdos challenged himself and the entire mathematical community. And by the way, I was happy to learn a bit about Ramsey theory, discover the really beautiful Lovasz local lemma, and be intrigued of the theorem of penta chords and its demonstration by projective geometry.