Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

  7. current community

    your communities

    more stack exchange communities

    company blog
Mathematics
Meta User
Network Profile
61,534
reputation
4
39
94

David C. Ullrich

Nothing about me is of any interest whatever.

1,997
answers
38
questions
~362k
people reached
  • Member for 3 years, 9 months
  • 8,942 profile views
  • Last seen 14 hours ago

Communities (8)

Top Meta Posts
17
2

Top Network Posts

Top Tags (474)

Score 1,236
Posts 563
Posts % 28
Score 652
Posts 351
Score 487
Posts 293
Score 396
Posts 228
Score 379
Posts 140
Score 290
Posts 112
View all tags →

Top Posts (2,035) All Questions Answers | Votes Newest

74 Are there theoretical applications of trigonometry? May 2 '16
57 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
View all questions and answers →

Badges (137)

Gold

4

Rarest

Silver

39

Rarest

Bronze

94

Rarest

View all badges →