Pi or π is a mathematical constant and a transcendental (and therefore irrational) real number, approximately equal to 3.14159, which is the ratio of a circle's circumference to its diameter in Euclidean geometry, and has many uses in mathematics, physics, and engineering. (...)

The mathematical constanteis the unique real number such that the value of the derivative (slope of the tangent line) off(x) =eat the point^{x}x= 0 is exactly 1. The functioneso defined is called the exponential function, and its inverse is the natural logarithm, or logarithm to base^{x}e. The numbereis occasionally called Euler's number after the Swiss mathematician Leonhard Euler, or Napier's constant in honor of the Scottish mathematician John Napier who introduced logarithms.

## Friday, July 20, 2007

### Blind Date - Olde English Sketch Comedy

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