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• Today, 00:39
Thanks GJA ... your post is extremely helpful and clarifying ... Just a simple point of clarification ... You write: " ... ... Take...
3 replies | 45 view(s)
• Yesterday, 05:54
MarkFL replied to a thread Evolution Self-Destructs in Chat Room
Haha...you went straight for the big gun..."Darwin's Bulldog" himself.
10 replies | 134 view(s)
• Yesterday, 04:27
I just thought I would share with MHB members Duistermaat and Kolk "Remark on notation". This remark occurs after the definition of directional and...
3 replies | 45 view(s)
• Yesterday, 00:56
If we integrate, we get: \ln|f(x)|=C-x This implies: f(x)=\pm e^{C-x}=\pm e^Ce^{-x} Now, let c_1=\pm e^{C} and also let $c_1=0$...
7 replies | 95 view(s)
• Yesterday, 00:34
You haven't studied integration yet?
7 replies | 95 view(s)
• Yesterday, 00:15
Let's use the notation of Leibniz and write: \d{f}{x}=-f(x) Now what if we separate variables and write: \frac{1}{f(x)}\,df=-dx We have...
7 replies | 95 view(s)
• February 22nd, 2018, 23:41
Hello, and welcome to MHB! (Wave) Do you mean: f(x)=-f'(x) ?
7 replies | 95 view(s)
• February 22nd, 2018, 23:30
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ... I am focused on Chapter 2:...
3 replies | 45 view(s)
• February 22nd, 2018, 23:01
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ... I am focused on Chapter 2:...
0 replies | 27 view(s)
• February 22nd, 2018, 22:24
MarkFL replied to a thread Evolution Self-Destructs in Chat Room
According to what I could find online, Dr. Morris is a young Earth creationist with a degree in geological engineering. If you can point to the peer...
10 replies | 134 view(s)
• February 22nd, 2018, 22:14
MarkFL replied to a thread Evolution Self-Destructs in Chat Room
This argument sounds very similar to: Watchmaker analogy The above article contains some noteworthy criticisms of the analogy. :)
10 replies | 134 view(s)
• February 22nd, 2018, 15:25
It's a "rite of passage" for calculus students. (Smile)
3 replies | 55 view(s)
• February 22nd, 2018, 07:20
l will now attempt to, explicitly, complete the demonstration that Df(a) v = \sum_{ 1 \le j \le n } v_j D_j f(a) \ \ \ \ (v \in \mathbb{R}^n ) ...
4 replies | 77 view(s)
• February 22nd, 2018, 01:11
Here is an attempt to show Df(a) v = \sum_{ 1 \le j \le n } v_j D_j f(a) \ \ \ \ (v \in \mathbb{R}^n ) Now we have ... Df(a) v =...
4 replies | 77 view(s)
• February 22nd, 2018, 00:59
Thanks Country Boy ... ... appreciate the help ... Peter
4 replies | 77 view(s)
• February 22nd, 2018, 00:54
Thanks GJA ... that was really helpful ... Still reflecting on what you have said ... Thanks again ... Peter
2 replies | 63 view(s)
• February 21st, 2018, 23:26
Here is this week's POTW: Let $ABCD$ be a convex quadrilateral with $\overline{AB}=\overline{AD}$. Let $T$ be a point on the diagonal...
0 replies | 49 view(s)
• February 21st, 2018, 23:21
No one answered this weeks POTW...my solution follows: (a) Apply conservation of angular momentum (subscripts of $R$ pertain to the rod, while...
2 replies | 162 view(s)
• February 21st, 2018, 07:38
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ... I am focused on Chapter 2:...
4 replies | 77 view(s)
• February 21st, 2018, 06:50
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ... I am focused on Chapter 2:...
1 replies | 42 view(s)
• February 21st, 2018, 00:31
\frac{5}{4}\cdot\frac{4}{3}=\frac{5}{3} :)
14 replies | 236 view(s)
• February 20th, 2018, 23:10
MarkFL posted a visitor message on Peter's profile
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...
• February 20th, 2018, 22:24
Thanks again Krylov .... BUT ... just a comment on D&K's proof .... I have to say that D&K's proof of Hadamard's Lemma though valid, is not...
3 replies | 82 view(s)
• February 20th, 2018, 21:57
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ... I am focused on Chapter 2:...
0 replies | 27 view(s)
• February 20th, 2018, 21:26
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ... I am focused on Chapter 2:...
2 replies | 63 view(s)
• February 20th, 2018, 20:41
Thanks Krylov, ... followed your advice and obtained the result ... Thanks again ... Peter
3 replies | 82 view(s)
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### 6 Visitor Messages

1. Hello and welcome back to MHB, Turgul!

We are happy to see that you have returned, and we look forward to your continued participation here!

On Behalf Of MHB's Staff,

Ackbach.
2. I recently linked to a topic here on MMF, a topic I titled "Probability Challenge" (which I generalized from a problem I found posted here) so I think that may be it, as I don't recall seeing any other linked topics here at MMF recently. Anyway, thanks for answering my question, I do appreciate it!
3. You are welcome! Saw your answers to the two unanswered threads Homotopy and Affine transformation proof. Thank you on behalf of the staff of MHB for the contributions!
4. If you don't mind me asking, how did you find us here? I'm just curious what avenues new members have taken to get here.
5. Hey, glad to see a familiar name show up here!

I want to welcome you to a great site and I look forward to reading your posts, as I know you to be a great contributor on MMF and I know you will be a great contributor here as well. I think you will enjoy this site, it has a lot to offer!

Best Regards,

Mark
6. Hi Turgul! Welcome to MHB! Hope you'll enjoy being here!
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