Mastodawn

Happy Pi Day 🥧
And Happy Birthday to Albert Einstein.

Here are a few mathematical representations of π developed over the ages. Can you identify the mathematicians behind these equations?

Pi (π) is the ratio of a circle's circumference to its diameter. It is an irrational, transcendental number; its decimal digits continue infinitely without repeating.

π = 3.1415926535 8979323846 2643383279 5028841971 6939937510 ...

https://en.wikipedia.org/wiki/Pi_Day
https://en.wikipedia.org/wiki/Pi
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AkaSci 🛰️Mar 14

NASA uses a value of π = 3.141592653589793 with 15 decimal digits for interplanetary navigation.

Calculating the circumference of the circle with radius = 32 billion km, slightly larger than the distance of the Voyager 1 spacecraft, and π with 15 digits, gives an error of just 1.5 cm.

Calculating the circumference of the Universe with radius = 46 billion light years, with an accuracy equal to the diameter of a hydrogen atom, requires 37 decimal digits.
🔭
https://www.jpl.nasa.gov/edu/news/how-many-decimals-of-pi-do-we-really-need/
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Andy Wootton

@AkaSci It's probably only the last digit that really matters.