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Mathematics
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David C. Ullrich

Nothing about me is of any interest whatever.

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  • Member for 3 years, 7 months
  • 8,602 profile views
  • Last seen 13 mins ago

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Posts 554
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Top Posts (1,983) All Questions Answers | Votes Newest

73 Are there theoretical applications of trigonometry? May 2 '16
56 Did Joseph Fourier ever make a pure mathematical mistake? Jun 24 '16
52 What is the average rational number? May 28 '16
38 Does every infinite field contain a countably infinite subfield? Nov 7 '15
35 Is every noninvertible matrix a zero divisor? Jul 15 '15
23 Does there exist a continuous and differentiable function satisfying the given equation Feb 20 '18
22 Problem of a slow thinker Jul 14 '18
21 Second derivative of $\det(\mathbb{1}+tA)$? Jun 25 '18
21 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 '16
20 Can we recover a space from its continuous functions? Oct 1 '15
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