Poincaré and the Early History of 3-manifolds
Poincaré and the Early History of 3-manifolds Lovely article on manifolds and topology. Very nice to see a variety of core concepts and history in one place. I learned a lot! http://www.ams.org/journals/bull/2012-49-04/S0273-0979-2012-01385-X/S0273-0979-2012-01385-X.pdf