Does the number Pi actually exist?

Описание: Whether or not pi exists has some very deep implications about circles, matter, computing, space-time, gravity, and quantum physics. Let's see if we can tackle some of them in honor of pi day!
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OTHER SOURCES

http://mathworld.wolfram.com/PiFormul...
http://www.geom.uiuc.edu/~huberty/mat...
https://www.exploringbinary.com/pi-an...
https://www.rapidtables.com/convert/n...
https://apod.nasa.gov/htmltest/gifcit...
https://www.etymonline.com/word/irrat...
https://en.wikipedia.org/wiki/Double-...
http://www.preposterousuniverse.com/b...
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