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.