Raymond Smullyan is 94 and still writing books. http://www.amazon.com/Beginners-Guide-Mathematical-Logic/dp/0486492370/ref=sr_1_2?s=books&ie=UTF8&qid=1381949215&sr=1-2 … A true sage!
0 replies
1 retweet
1 like
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.
. Banned in Sweden. SubGenius, Zhuangist, white-hat troll. Defrocked mathematician. Brain problems.