Mathematics
Derek Jennings's user avatar
Derek Jennings's user avatar
Derek Jennings's user avatar
Derek Jennings
  • Member for 13 years, 3 months
  • Last seen more than a month ago
Profile Activity
Stats
13,451
reputation
1.1m
reached
156
answers
4
questions
Communities
View all
About

Mathematician, linguist, finance expert and struggling athlete. Find me at https://www.youtube.com/@derekrunsagain and at https://derekjennings.000webhostapp.com/

Badges
View all badges
1
gold badge
37
silver badges
59
bronze badges
Top tags
View all tags
314
Score
28
Posts
18
Posts %
201
Score
32
Posts
20
Posts %
187
Score
12
Posts
8
Posts %
185
Score
24
Posts
15
Posts %
152
Score
19
Posts
12
Posts %
127
Score
13
Posts
8
Posts %
Top posts
View all questions and answers
All Questions Answers
Score Newest
answer
102
Ways to evaluate $\int \sec \theta \, \mathrm d \theta$
Oct 13, 2010
answer
71
Prove $0! = 1$ from first principles
Feb 8, 2011
answer
39
The Basel problem
Nov 3, 2010
answer
33
Evaluating the integral $\int_0^\infty \frac{\sin x} x \,\mathrm dx = \frac \pi 2$?
Sep 23, 2010
answer
31
Proving $\prod_{j=1}^n \left(4-\frac2{j}\right)$ is an integer
Dec 9, 2010
answer
27
Proof of $\int_0^\infty \left(\frac{\sin x}{x}\right)^2 \mathrm dx=\frac{\pi}{2}.$
Dec 7, 2010
question
26
The order of the number of integer pairs satisfying certain arithmetical function relationships
Nov 22, 2010
answer
26
Why is $\pi $ equal to $3.14159...$?
Jan 13, 2011
answer
26
Common misconceptions about math
Nov 17, 2010
answer
25
Summing $\frac{1}{e^{2\pi}-1} + \frac{2}{e^{4\pi}-1} + \frac{3}{e^{6\pi}-1} + \cdots \text{ad inf}$
Nov 4, 2010
Top Meta posts
1
0
4
Should the reason individual voters gave for closing a question be displayed?
Top network posts
View all network posts
42
Which is correct: "one or more is" or "one or more are"?
19
Are there any differences between "update" and "upgrade"?
15
Buying insurance (extended warranty or guarantee) on everyday goods / appliances?
13
"Interested in knowing" versus "interested to know"
8
Locating all the deceased's assets in the UK

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.