This is a two-page rigorous proof that I gifted as a t-shirt to my friend Eylül ( ≡ e^{y|u|}) during my sophomore year. Hint: Wikipedia 9 viewsClick to email a link to a friend (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to print (Opens in new window)MoreClick to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)