Mathematics
David Z's user avatar
David Z's user avatar
David Z's user avatar
David Z
  • Member for 12 years, 6 months
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About

I'm a software engineer, 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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All Questions Answers
Score Newest
answer
61
Why do we still do symbolic math?
Jul 29, 2014
question
57
Why doesn't induction extend to infinity? (re: Fourier series)
Jan 11, 2012
answer
25
% of % - Please Help Me Prove My Friend Wrong
Nov 27, 2014
answer
21
What's so special about sine? (Concerning $y'' = -y$)
Feb 28, 2012
answer
14
What does .9 with a line above the 9 mean?
Jun 3, 2015
answer
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
question
11
Is any divergence-free curl-free vector field necessarily constant?
Jan 28, 2011
question
10
What's the right way to make a change of variables under another integral?
Sep 4, 2012
question
7
What's the term for a "physical vector space"?
May 11, 2014
answer
7
Where do the first two numbers of Fibonacci Sequence come from?
Feb 17, 2014
Top Meta posts
1
11
20
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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700
How do I find the package that provides a file?
629
Update Git submodule to latest commit on origin
599
Shuffle an array with python, randomize array item order with python
327
How do I pass a method as a parameter in Python
285
How to calculate the time interval between two time strings

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