User talk:Prime.mover

External link suggestion for "Equivalence of Definitions of Ellipse"
Maybe you could consider adding a link on the page Equivalence of Definitions of Ellipse to a "pure" geometric proof that can be found here http://www.lucamoroni.it/ellipse-geometric-proof-equivalent-definitions-foci-directrix/ It's a different approach to showing the equivalence of the definition of the ellipse based on purely plane geometry arguments and I think it could fit well (as a complement) in the Ellipse page of Proof Wiki.


 * Alternatively you may wish to add the proof yourself -- we don't link to proofs, we include them complete.


 * Incidentally, please sign your posts. --prime mover (talk) 15:23, 20 November 2016 (EST)

Length of Arc of Cycloid/Proof 2
I found the main part of the proof here, but I quite believe it's lacking some common sense. We need a much clearer sketch than this. Simcha Waldman (talk) 07:05, 21 November 2016 (EST)