# 1 = 0.999999999…

This simple equation, which states that the quantity 0.999, followed by an infinite string of nines, is equivalent to one, is the favorite of mathematician Steven Strogatz of Cornell University.

"I love how simple it is — everyone understands what it says — yet how provocative it is," Strogatz said. "Many people don't believe it could be true. It's also beautifully balanced. The left side represents the beginning of mathematics; the right side represents the mysteries of infinity."

## Notes:

An equation that is challenging, provocative, and portrays both the certainty of mathematics and its infinity.

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**Album: The World's Most Beautiful Equations**

**Electronic/World Wide Web>**

**Internet Article:**Moskowitz, Clara (29 January 2013)

*, Album: The World's Most Beautiful Equations*, LiveScience, Retrieved on 2013-02-14

**Folksonomies:**mathematics beauty