http://www.preposterousuniverse.com/blog/2014/03/13/einstein-and-pi/
Hey, what is π doing there? It seems a bit gratuitous, actually. Einstein could easily have defined a new constant
H simply be setting
H=8π
G.
Then he wouldn’t have needed that superfluous 8π cluttering up his
equation. Did he just have a special love for π, perhaps based on his
birthday?
