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• Yesterday, 22:16
Update - Version 1.3.1: Bug fix for usernames with special characters.
2 replies | 198 view(s)
• Yesterday, 19:16
Thank you very much for pointing this out! This is a huge security vulnerability related to the username markup add-on. I found a way to fix that...
15 replies | 420 view(s)
• Yesterday, 19:16
I have added code to that external script so a single quote in a username won't throw an error, and I edited the post so that only the username is...
15 replies | 420 view(s)
• Yesterday, 12:00
Here is this week's POTW: A small bug is placed between two blocks of masses $m_1$ and $m_2$ ($m_1>m_2$) on a frictionless table. A horizontal...
0 replies | 20 view(s)
• Yesterday, 11:59
No one answered this week's problem, and my solution is as follows: A formula for power $P$ we can apply here is: P=\frac{1}{2}\mu\omega^2A^2v...
1 replies | 63 view(s)
• April 19th, 2018, 10:33
I love this stuff! An amateur gets this one, though his result is refined by the pros. His paper on arXiv is here.
2 replies | 41 view(s)
• April 19th, 2018, 09:38
Here is this week's POTW: ----- What is the largest possible radius of a circle contained in a $4$-dimensional hypercube of side length $1?$ ...
0 replies | 22 view(s)
• April 19th, 2018, 09:36
Congratulations to castor28 for his correct solution, and an honorable mention to kiwi for a mostly correct solution, to this week's POTW, which was...
1 replies | 66 view(s)
• April 19th, 2018, 07:45
Sorry mathmari! I quickly read the question and saw that you were formulating a two sample question but I didn't catch that it could be condensed...
10 replies | 78 view(s)
• April 18th, 2018, 21:59
Hey mathmari, I would use the second way to frame this. This link should be useful for comparing two samples of proportions. - Not a two...
10 replies | 78 view(s)
• April 15th, 2018, 20:01
Awesome work, as always Chris! (Yes) Using your post, where the base case and induction statement have been given, then the induction step would...
6 replies | 124 view(s)
• April 15th, 2018, 12:02
Here are the choices: A.) \frac{1}{2} B.) \frac{1}{2}-\frac{2^{2006}}{3^{2^{2006}}-1} C.) \frac{1}{2}-\frac{2^{2005}}{3^{2^{2005}}-1} D.)...
6 replies | 124 view(s)
• April 14th, 2018, 22:50
Hi there, How does the area of the shaded region relate to a p-value in hypothesis testing? In a left-tailed test is the area we look at the area...
1 replies | 44 view(s)
• April 14th, 2018, 22:49
Hi lola9991, How would you explain or write Bayes' Theorem to start? How would you write A in conditional probability notation?
1 replies | 47 view(s)
• April 14th, 2018, 22:47
Hey mathmari, I agree with your problem set up. Most people really fail to understand the concept of a p-value as a conditional probability and...
10 replies | 96 view(s)
• April 14th, 2018, 10:56
The actual sum he's given is: S=\sum_{k=0}^{2006}\left(\frac{2^k}{3^{2^k}+1}\right) And he's given several choices for the result. I was hoping...
6 replies | 124 view(s)
• April 14th, 2018, 10:10
Hello MHB! (Wave) A young man in high school I know has been essentially tasked with finding the following partial sum: ...
6 replies | 124 view(s)
• April 12th, 2018, 11:47
MarkFL replied to a thread Hello from Pan in Introductions
Hello, and welcome to MHB panpan! (Wave)
6 replies | 86 view(s)
• April 12th, 2018, 11:15
Hello, MHB Community! (Wave) anemone has asked me to stand in for her for a few weeks, so please be gentle. (Bigsmile) Here is this week's...
1 replies | 63 view(s)
• April 12th, 2018, 11:11
Hello MHB Community! (Wave) I am going to stand in for anemone for a few weeks. Congratulations to the following for their correct submissions:...
1 replies | 129 view(s)
• April 11th, 2018, 09:40
Ackbach replied to a thread Jokes in Chat Room
Person A: Knock, knock. Race condition. Who's there?
169 replies | 23457 view(s)
• April 10th, 2018, 12:00
Here is this week's POTW: ----- Solve for $x, y, z$ (in terms of $a, r, s, t$): \begin{align*} yz&=a(y+z)+r\\ zx&=a(z+x)+s\\ xy&=a(x+y)+t....
1 replies | 66 view(s)
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