What is e? And why are exponentials proportional to their own derivatives? Full series: 3b1b.co/calculus Brought to you by you: 3b1b.co/eoc5-thanks Supporters often get early access as the series like this: 3b1b.co/support ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted about new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: 3b1b.co/recommended Various social media stuffs: Website: www.3blue1brown.com Twitter: twitter.com/3Blue1Brown Patreon: patreon.com/3blue1brown Facebook: www.facebook.com/3blue1brown Reddit: www.reddit.com/r/3Blue1Brown