Attention! 

This image is incorrect (mathematical error)! Euler's totient function is defined for the Natural numbers, not for the Real numbers. Therefore, an image has to show a sequence of points, not a line. There are no values for noninteger "x". 
Derived from http://commons.wikimedia.org/wiki/File:EulerPhi100.svg which is licensed CC0
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Euler's totient function
Euler's totient function, first found by Leonhard Euler, is a function that yields the number of...
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current  17:28, May 9, 2012  420 × 281 (36 KB)  Starfall.V (Talk  contribs) 