Happy PI Day
from
http://spaceweather.comHAPPY PI DAY: March 14th (3.14) is PI day and all around the world mathematicians are celebrating this compelling and mysterious constant of Nature. Pi appears in equations describing the orbits of planets, the colors of auroras, the structure of DNA. It's everywhere.
Humans have been struggling to calculate for thousands of years. Divide the circumference of a circle by its diameter; the ratio is . Sounds simple, but the devil is in the digits. While the value of is finite (a smidgen more than 3), the decimal number is infinitely long:
3.1415926535897932384626433832795
02884197169399375105820974944592307
81640628620899862803482534211706...[quote/]
Remember 22/7ths, Series expansions and all that stuff?