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Even After 22 Trillion Digits, We’re Still No Closer To The End Of Pi | FiveThirtyEight
Depending on your philosophical views on time and calendars and so on, today is something like the 4.5 billionth Pi Day that Earth has witnessed. But that long history is nothing compared to the infinity of pi itself.
A refresher for those of you who have forgotten your seventh-grade math lessons1: Pi, or the Greek letter π, is a mathematical constant equal to the ratio of a circle’s circumference to its diameter — C/d. It lurks in every circle, and equals approximately 3.14. (Hence Pi Day, which takes place on March 14, aka 3/14.)
math  538 
april 2018 by rgl7194
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