[math-fun] fine structure constant, Pi, euler formula and approximations : Atiyah paper on the F.S. constant

Hello,  I have found the article of Atiyah about the Todd function and the fine structure constant, in this paper Atiyah reinvent Euler's Formula : exp(I*Pi) + 1 = 0 in a very surprising way. https://drive.google.com/file/d/1WPsVhtBQmdgQl25_evlGQ1mmTQE0Ww4a/view If you can't get it, I made a copy here: plouffe.fr/2018-The_Fine_Structure_Constant.pdf Bonne lecture, best regards, Simon Plouffe