Graph of the first 100 values for <a href="https://en.wikipedia.org/wiki/Euler%27s_totient_function" class="extiw" title="en:Euler's totient function">en:Euler's totient function</a> <br><i>Note that the lower bound of y = 4n/15 is not an actual lower bound for the complete totient function (over all natural numbers)! There are many values below that line, but none in the first 100.</i>
<a href="//commons.wikimedia.org/wiki/User:Jokes_Free4Me" title="User:Jokes Free4Me">User:Jokes_Free4Me</a>
2009-02-09
<span class="int-own-work" lang="en">Own work</span>