Tuesday, April 4, 2017

Retired German man solves one of world's most complex maths problem with 'simple proof'

http://ift.tt/2ovoRk0

Submitted April 04, 2017 at 04:13AM by GreenKronic http://ift.tt/2nElwek Check me out at http://ift.tt/1RyFBcs !

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