User basil - MathOverflow most recent 30 from http://mathoverflow.net 2013-05-24T12:40:29Z http://mathoverflow.net/feeds/user/8028 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/3134/whats-your-favorite-equation-formula-identity-or-inequality/33819#33819 Answer by basil for What's your favorite equation, formula, identity or inequality? basil 2010-07-29T18:00:40Z 2010-07-29T18:00:40Z <p>d/dx (e^x) =e^x</p>