A brief collection of Twitter tributes to the irreplaceable mathematician John Horton Conway, who passed away yesterday.
https://twitter.com/wtgowers/status/1249102738828316672
https://twitter.com/JSEllenberg/status/1249062835793125380
https://twitter.com/CardColm/status/1249038195880341505
https://twitter.com/numberphile/status/1249071255011065856
https://twitter.com/AdiShavit/status/1249055920111452163
https://twitter.com/standupmaths/status/1249105201992171522
https://twitter.com/JimPropp/status/1249188819427090432
You should also read @sioroberts' biography "Genius at Play" for a beautiful portrait of the man. https://amzn.to/3ebK8pD 
Another lovely tribute pointed out by @SheckyR: https://twitter.com/EricRWeinstein/status/1249196190740164608
And recollections from historian @MBarany: https://twitter.com/MBarany/status/1249340563108900864
See also Scott Aaronson's post, with recollections from @GilKalai and others in the comments:
https://www.scottaaronson.com/blog/?p=4732 
Also, this important thread by @WanderingPoint: https://twitter.com/WanderingPoint/status/1249386686590660608
You can follow @benorlin.
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