Ben Alpert
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 Jul 16 awarded Nice Question Jun 28 revised What is this R-like symbol power 2? Photoshopped the image to make it easier to read Jun 28 suggested approved edit on What is this R-like symbol power 2? Jun 27 comment Choose K items from N in a circle No problem, hopefully now it's a little easier to understand! Jun 26 revised Choose K items from N in a circle fix align* formatting Jun 26 suggested approved edit on Choose K items from N in a circle Jun 23 comment Use of “inverse” to mean reciprocal Yes, I understood that the reciprocal is a type of inverse, but "inverse" seems overly general to specify a reciprocal relationship. Jun 23 asked Use of “inverse” to mean reciprocal Jun 22 comment Finding $\sin(4a)$ if we know $\cos a$ Please ask your second problem as an entirely new question instead of as an edit to this one. Jun 21 comment Proving Stewart's theorem without trig Thanks, your answer is definitely good enough for my purposes. Good night! Jun 21 comment Proving Stewart's theorem without trig Very nice, thanks! Jun 21 accepted Proving Stewart's theorem without trig Jun 21 asked Proving Stewart's theorem without trig May 26 awarded Nice Answer May 15 comment Function $F$ that $F(x)+F(-x)=\lim_{y\rightarrow\infty}F(y), \forall x \in \mathbb{R}$ @Tim: Might want to change the title too. May 10 comment Calculate intersection of 2 points @J.M. I'm pretty sure Ross Millikan interpreted it right. You have two points and two slopes given as angles from the vertical ($\pi/2$) and want the intersection between the two lines thus determined. May 4 revised How to accurately calculate the error function erf(x) with a computer? fix broken link! May 4 suggested approved edit on How to accurately calculate the error function erf(x) with a computer? Apr 28 comment Why the name 'FACTORIAL'? But that's true of other numbers (both smaller and larger) that aren't the factorial. Apr 27 revised How to solve this recurrence relation? (convolution integral) edited tags