Mathematics
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David Z

I'm a software engineer at SoundHound, and a former theoretical physicist.

You can email me at stack@ellipsix.net for matters which cannot be handled on the site. (I do not answer questions by email which could be posted on the site.)

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60 Why do we still do symbolic math? Jul 29 '14
52 Why doesn't induction extend to infinity? (re: Fourier series) Jan 11 '12
25 % of % - Please Help Me Prove My Friend Wrong Nov 27 '14
20 What's so special about sine? (Concerning $y'' = -y$) Feb 28 '12
14 What does .9 with a line above the 9 mean? Jun 3 '15
11 How to prove that perpendicular from right angled vertex to the hypotenuse is at most half the length of hypotenuse of a right triangle? Jun 17 '20
9 What's the right way to make a change of variables under another integral? Sep 4 '12
8 Is any divergence-free curl-free vector field necessarily constant? Jan 28 '11
7 What's the term for a “physical vector space”? May 11 '14
7 Where do the first two numbers of Fibonacci Sequence come from? Feb 17 '14
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