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Mathematics
David Z's user avatar
David Z's user avatar
David Z's user avatar
David Z
  • Member for 13 years, 11 months
  • Last seen this week
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About

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

You can email me at [email protected] 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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Top posts
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62
Why do we still do symbolic math?
Jul 29, 2014
59
Why doesn't induction extend to infinity? (re: Fourier series)
Jan 11, 2012
24
% of % - Please Help Me Prove My Friend Wrong
Nov 27, 2014
21
What's so special about sine? (Concerning $y'' = -y$)
Feb 28, 2012
14
What does .9 with a line above the 9 mean?
Jun 3, 2015
11
Is any divergence-free curl-free vector field necessarily constant?
Jan 28, 2011
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, 2020
11
What's the term for a "physical vector space"?
May 11, 2014
10
What's the right way to make a change of variables under another integral?
Sep 4, 2012
7
Where do the first two numbers of Fibonacci Sequence come from?
Feb 17, 2014
Top Meta posts
1
12
21
When do we upvote or accept an answer?
19
Asked a trivial question, got a simple answer,was put on hold. Should I delete it?
12
Is it okay to edit titles of questions by other users to make them more descriptive?
7
What to do when I get no feedback on an answer to my own question?
6
Not answering questions(yet)
Top network posts
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770
How do I find the package that provides a file?
682
Update Git submodule to latest commit on origin
630
Shuffle an array with python, randomize array item order with python
288
What really allows airplanes to fly?
288
How to calculate the time interval between two time strings