figure for <a href="https://en.wikipedia.org/wiki/Brachistochrone_curve" class="extiw" title="en:Brachistochrone curve">Brachistochrone curve</a> based on a reading of a proof by Jacob Bernoulli published in Acta Eruditorum in 1697
<a href="https://en.wikipedia.org/wiki/User:Jbergquist" class="extiw" title="en:User:Jbergquist">Jbergquist</a> (<a href="https://en.wikipedia.org/wiki/User_talk:Jbergquist" class="extiw" title="en:User talk:Jbergquist">talk</a>)
2009-06-17
<span class="int-own-work" lang="en">Own work</span> (<span lang="en" dir="ltr">Original text: <i><bdi lang="">I created this work entirely by myself.</bdi></i></span>)