Euler's Identity

In analytical mathematics, Euler's identity (also known as Euler's equation), named for the Swiss-German mathematician Leonhard Euler, is the equality

where

e is Euler's number, the base of natural logarithms,
i is the imaginary unit, which satisfies i2 = −1, and
π is pi, the ratio of the circumference of a circle to its diameter.

Read more about Euler's Identity:  Explanation, Generalizations, Attribution, Mathematical Beauty

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