2019-09-01 math https://blog.stephenwolfram.com/2019/08/a-book-from-alan-turing-and-a-mysterious-piece-of-paper/?fbclid=IwAR0OWVVpjZrvTOQx3h13ZUZDNCin0XoVFm75TFCpcAnm101poWcchW3IOiY