Mathematics
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David C. Ullrich
  • Member for 6 years, 11 months
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Nothing about me is of any interest whatever.

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All Questions Answers
Score Newest
answer
79
Are there theoretical applications of trigonometry?
May 2, 2016
answer
62
Did Joseph Fourier ever make a pure mathematical mistake?
Jun 24, 2016
answer
55
What is the average rational number?
May 28, 2016
answer
45
Is every noninvertible matrix a zero divisor?
Jul 15, 2015
answer
39
Does every infinite field contain a countably infinite subfield?
Nov 7, 2015
answer
35
Problem of a slow thinker
Jul 14, 2018
answer
24
Second derivative of $\det(\mathbb{1}+tA)$?
Jun 25, 2018
answer
24
Extension of real analytic function to a complex analytic function
Apr 27, 2016
answer
24
If every five point subset of a metric space can be isometrically embedded in the plane then is it possible for the metric space also?
Jun 17, 2016
answer
22
Reference for "distributional derivative being zero implies being constant"
Aug 15, 2015
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"What have you tried?"...
21
"... including any attempts you have made to solve it."
14
Reference Request not a request for a reference?
13
Policy on posting links to pirated content?
12
Are questions about history on topic?
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Finding all roots of a polynomial
6
Conditional \bye?

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