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• Today, 07:48
Not just for the next term, but for the whole sequence! In fact, your prediction and mine both say that the $(n+1)$th term minus the $n$th term is...
8 replies | 105 view(s)
• Today, 06:54
My own best guess was to look at the differences: $\frac 13, \frac 16, \frac 1{10}$. The next difference might be $\frac 1{15}$, although it does...
8 replies | 105 view(s)
• Today, 06:37
Hi hm2018April, and welcome to MHB! Mathematicians hate problems like this, because there usually isn't a single, "correct" solution. You need to...
8 replies | 105 view(s)
• Today, 01:48
Thanks GJA ... Appreciate your help... Peter
2 replies | 32 view(s)
• Today, 00:24
Hi, Peter. The condition that needs to occur in order to form the composition $f'f$ (or any function composition) is that $f$'s range must be a...
2 replies | 32 view(s)
• Yesterday, 23:24
I am reading Paul E. Bland's book "Rings and Their Modules" ... Currently I am focused on Section 3.2 Exact Sequences in \text{Mod}_R ... ... ...
2 replies | 32 view(s)
• Yesterday, 17:07
Since you know what the basis elements are, take one open set from your cover and use what you know about basis elements. You will need to reduce the...
5 replies | 89 view(s)
• Yesterday, 15:52
I like Serena replied to a thread Special Relativity in Physics
It's the other way around.
11 replies | 128 view(s)
• Yesterday, 15:26
I like Serena replied to a thread Right triangle. in Geometry
For the record, something like that is called a sangaku. A drawing that exhibits a proof, without any words, expressions, or symbols. Admittedly my...
13 replies | 122 view(s)
• Yesterday, 15:04
I like Serena replied to a thread Right triangle. in Geometry
You mean just drawings? (Wondering) Something like this: \begin{tikzpicture} %preamble \usetikzlibrary{arrows} \def\a{sqrt(17)} ...
13 replies | 122 view(s)
• Yesterday, 14:00
A basic-open element is a finite intersection of sets of the form $\pi_k^{-1}(O_k)$ where $O_k$ is any subset of $\{0,1\}$ and $\pi_k$ is the $k$th...
5 replies | 89 view(s)
• Yesterday, 13:37
I like Serena replied to a thread Right triangle. in Geometry
To be honest, I only used trigonometry because it means I have to use fewer words to explain those ratios! (Rofl)
13 replies | 122 view(s)
• Yesterday, 13:31
Krylov replied to a thread Algebra II in Pre-Algebra and Algebra
Hello and welcome, This is not a question, but rather a symbolic expression. Would you like the expression simplified? One way is to note that...
1 replies | 48 view(s)
• Yesterday, 13:20
I like Serena replied to a thread Right triangle. in Geometry
Trigonometry is only used in the first step. We can replace it with non-trigonometry by observing that triangles ABC and ACD are similar, meaning...
13 replies | 122 view(s)
• Yesterday, 13:18
Yes, first do what post #2 says. You can make it a bit simpler for yourself by restricting to basic-open covers: Show that every cover consisting...
5 replies | 89 view(s)
• Yesterday, 13:02
Hi Alexmahone, One way to proceed is to take an arbitrary open cover $\{U_{\alpha}\}_{\alpha\in\mathcal{I}}$ and prove that it must admit a finite...
5 replies | 89 view(s)
• Yesterday, 12:55
I like Serena replied to a thread Right triangle. in Geometry
Let's make a drawing: \begin{tikzpicture} %preamble \usetikzlibrary{arrows} \def\a{sqrt(17)} \def\b{sqrt(68)} \def\c{sqrt(85)} ...
13 replies | 122 view(s)
• Yesterday, 09:13
I like Serena replied to a thread Special Relativity in Physics
Indeed, the distance travelled is $v\Delta t' = 240\text{ lightyear}$. So we have $\Delta t' = \frac{240\text{ lightyear}}{v}$ and $\Delta t =... 11 replies | 128 view(s) • Yesterday, 08:57 Let$A = \begin{bmatrix}0&1\\1&1\end{bmatrix} = \begin{bmatrix}\varphi_0&\varphi_1\\ \varphi_1&\varphi_2\end{bmatrix}$. By induction,$A^n =...
2 replies | 58 view(s)
• Yesterday, 05:39
Krylov replied to a thread Olinguito in Introductions
Welcome, Olinguito, I hope you will enjoy these forums! Your forum handle taught me about a newly discovered mammal, thank you for that.
8 replies | 102 view(s)
• April 22nd, 2018, 12:30
Let me throw in another XKCD: I do hope that no one drops our people table! (Worried)
19 replies | 514 view(s)
• April 22nd, 2018, 11:32
I like Serena replied to a thread Optics: Lenses in Physics
Normally the object and image are at different sides of the lense, meaning their distances add up. However, it is possible that we have a virtual...
6 replies | 87 view(s)
• April 22nd, 2018, 10:17
MarkFL replied to a thread Olinguito in Introductions
Hello, and welcome to MHB! (Wave)
8 replies | 102 view(s)
• April 22nd, 2018, 09:57
Opalg replied to a thread Banach space in Analysis
$$|f_n(x)-f_m(x)|=\left| \frac{\sin^2\left (\frac{2\pi}{T}x\right )}{\frac{1}{n}+\left |\sin\left (\frac{2\pi}{T}x\right )\right |}-\frac{\sin^2\left... 6 replies | 78 view(s) • April 22nd, 2018, 09:31 Good! (Happy) We have:$$\epsilon = -\d \Phi t = -\d {(B_i A_i + B_o A_o)} t\approx -A_i\d {B_i} t  where $A_i$ is the cross sectional area...
9 replies | 120 view(s)
• April 22nd, 2018, 08:59
I like Serena replied to a thread Banach space in Analysis
$C(\mathbb{R})$ means that $\forall t\in \mathbb R: \lim_{h\to 0} f(t+h)=f(t)$. Will that be true if $f$ is the absolute converging limit of a...
6 replies | 78 view(s)
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### 20 Visitor Messages

1. Hi Peter,

Thank you for pointing this out to me. I will talk it over with the staff.

In the future there is a "report" button for posts which will create a thread in the staff forum for us to review. This is just for your convenience and to keep things less public if you like. I don't mind you reaching out to me in any way that you like.

Best,
Jameson
2. Hello Peter,

When I first saw that post, I saw that Adrian (Ackbach) had replied to it, so I didn't think much about it. The user to whom Wilmer was addressing his post was already on staff radar as being a potential spammer. Wilmer's posting demeanor can be a bit rough sometimes, but he means no harm as far as I can tell.
3. Sometimes editing a thread title is an issue, but the issue is with vBulletin. If you ever want to change a thread title, and can't, just let me know and I can fix it.
4. Hey Peter!

I edited your post to remove the duplicate content. Sorry for the late reply, I was busy "powering through" a tedious 3 hour project.
5. Glad to hear that resolved the issue! I thought perhaps forcing your browser to reload the script by removing it from your cache might do the trick.
7. Hey Peter,

No, there have been no changes in that regard, at least that I know of. Do you visit any other sites that use MathJax? If so does it render there?

Best Regards,

Mark.
8. Good deal, Peter! I wish I had a nickel for every time a problem is corrected by ditching IE and using a modern standards compliant browser.
9. I would try another browser...IE is notorious for being problematic.
10. Hello Peter,

No changes to composing posts have been made. What browser are you using? What OS?
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