John Conway has died
People here might know him best for the "Game of Life"[0], but he did so much more.  The book about Conway by Siobhan Roberts is an interesting read about the man and his work.  There's a review here.[1]Some will know Conway via is work on the Classification of Finite Simple Groups (with many others), some via his "Look and Say" sequence, while still others will know his book "Winning Ways"[2], written with Richard Guy[3] and Elwyn Berlekamp[4].  My copy signed by all three is something I treasure.I was privileged to know all three of them, and I mourn their passing.[0] https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life[1] https://www.theguardian.com/science/2015/jul/23/john-horton-...[2] https://en.wikipedia.org/wiki/Winning_Ways_for_your_Mathemat...[3] https://en.wikipedia.org/wiki/Richard_K._Guy[4] https://en.wikipedia.org/wiki/Elwyn_BerlekampAdded in Edit:From his wikipedia page:Known for: Surreal numbers, Conway groups, Monstrous moonshine, Doomsday algorithm, Look-and-say sequence, Icosians, Mathieu groupoid, Free will theorem, Conway chained arrow notation, Conway criterion, Conway notation (knot theory), Conway polyhedron notation, ATLAS of Finite Groups, Conway's Game of Life