Nicolas Cole https://www.quora.com/Is-it-possible-to-change-your-mentality-such-that-you-cannot-recognize-yourself-anymore Source: I’m not the same person as I used to be. Source #2: I use the above image to reinforce my point, but the physical changes alone hardly scratch the surface. On the left, I was 15 years old. I weighed less than 90lbs. I was sick just about every day (undiagnosed […]
Harris B. Daniels https://www.quora.com/Mathematics-What-is-the-most-beautiful-theorem-proof-and-why I am sure that there are some out there that would say that this does not constitute a proof, but I have always found this to be a beautiful justification for the following identity. ∑n=1∞12n=1∑n=1∞12n=1 Proof: I always show this to my students at the beginning of sequences and series.