• Yesterday, 23:08
I disagree with this...I think it is the societal attitude that it's okay to fail at math that is part of the problem. Someone says to their friends,...
5 replies | 36 view(s)
• Yesterday, 22:23
If we have 2000 people, 300 of which are women, then the probability that all 300 women will be on the same team is given by: P(A)=\frac{{1700...
4 replies | 33 view(s)
• Yesterday, 22:01
I think your second method is correct. Suppose we call the teams $X$ and $Y$...and now we need only look at one team, so let's look at team $X$. If...
4 replies | 33 view(s)
• Yesterday, 19:04
MarkFL replied to a thread Solar Eclipse 2017 in Chat Room
Yesterday during the big event, we had pervasive heavy cloud cover and intermittent rain. Today, sunny and clear all day. Story of my life...(Giggle)
7 replies | 214 view(s)
• Yesterday, 03:58
Suppose that $z_n\leqslant1$. Then $z_n^2 \leqslant z_n \leqslant 1$, $z_n^3 \leqslant z_n^2 \leqslant 1$, ... , and by induction $z_n^k\leqslant 1$...
4 replies | 66 view(s)
• August 21st, 2017, 12:26
Here is this week's POTW: ----- If a quadrilateral is circumscribed about a circle, prove that its diagonals and the two chords joining the...
0 replies | 37 view(s)
• August 21st, 2017, 12:22
Suppose \frac{3}{2}\le x \le 5. Prove that 2\sqrt{x+1}+\sqrt{2x-3}+\sqrt{15-3x}<2\sqrt{19}. Congratulations to MarkFL for his correct...
1 replies | 92 view(s)
• August 21st, 2017, 11:54
If $c>1$ then $c^n < c^{n+1}$. Raise both sides to the power $\frac1{n(n+1)}$ to get $c^{1/(n+1)} < c^{1/n}$. In other words, $z_{n+1} < z_n.$
4 replies | 66 view(s)
• August 20th, 2017, 01:29
MarkFL posted a visitor message on Peter's profile
Hey Peter! (Wave) I edited your post to remove the duplicate content. Sorry for the late reply, I was busy "powering through" a tedious 3 hour...
• August 17th, 2017, 06:02
Yes! (Yes)
3 replies | 68 view(s)
• August 17th, 2017, 02:10
Small quibble...axis of symmetry is: t=-\frac{1}{105} So, since the parabola opens up, the vertex is a minimum, so the minimum distance will be...
8 replies | 166 view(s)
• August 17th, 2017, 00:59
For a parabola of the form: f(x)=ax^2+bx+c We know the axis of symmetry is at: x=-\frac{b}{2a} So, for:
8 replies | 166 view(s)
• August 16th, 2017, 22:42
Overview: This product is designed to auto-post a welcome thread for all new users once they have completed all verifications, and/or returning...
0 replies | 28 view(s)
• August 16th, 2017, 21:58
Isn't this question a duplicate of the following? 231.12.3.65 Determine the smallest distance between a point and a line
1 replies | 43 view(s)
• August 15th, 2017, 11:11
Edit. I wrote this before seeing Evgeny's comment above. You should probably look at both comments in parallel.] I think you are right. There is...
3 replies | 74 view(s)
• August 14th, 2017, 01:09
MarkFL replied to a thread Solar Eclipse 2017 in Chat Room
I was just reading about how tree leaves can form "pinhole cameras" and the eclipse can be seen in their shadows:
7 replies | 214 view(s)
• August 13th, 2017, 14:03
MarkFL replied to a thread [SOLVED] 12 DeMoivre's theorem in Trigonometry
In case you're wondering how I obtained the following factorizations: 1+3i=(1+i)(2+i) 2-2i=-(1+i)^3 What I did for the first was to write: ...
13 replies | 265 view(s)
• August 13th, 2017, 10:15
MarkFL replied to a thread [SOLVED] 12 DeMoivre's theorem in Trigonometry
What definition for "complex form" were you given? That was the confusing issue for me. I am aware of rectangular, polar and exponential forms for...
13 replies | 265 view(s)
More Activity

### 14 Visitor Messages

1. Thanks, you are doing a great job. I went through your Laplace transform tutorial. It is a good practice to try the Laplace transform of some new functions, and it is fun as well.
2. Er, DW, your .sig seem to be getting out of the separator of every post, so sometimes they are almost unreadable. Can you do something about it?
3. Wow, thanks for the new tutorial DW, it's just what I needed, a brief series of values of polygamma function and a closed formula in general. Thanks again! (To reply Visitor Messages, first click on "View Conversation" then reply to it)
4. Thanks for the tip, Balarka!! I've corrected it now... Was referencing a paper on arXiv.
5. DW, in your #3 post in "Generalized Log-Trig series related to the Hurwitz Zeta", shouldn't the Dirichlet characters be defined over $\mathbb{Z}/8\mathbb{Z}$ instead of what is given? $\mathbb{Z}/8$ is a weird beast...
6. DW, you should post those special value of Clausen function you have found out on the wiki article. It's nearly stub, I wonder why they didn't add that tag to it.
7. Not a bad idea, but it takes all the fun out of it...

It is pretty funny, mind... Folks join up, can get their heads around mind-bending equations, but fall foul of basic forum software. Oh dear!
8. Some have even humorously suggested we need to present a User's Manual to people when they join due to all the features we have here. Perhaps someday I will write such a manual...hehehe.
9. Thanks Mark! Just been toying around a bit and found out where to go. Cheers for your help!
10. Hey Gethin,

Here is a link to a topic explaining how to respond to visitor messages so that it gets posted on the recipient's wall:

http://mathhelpboards.com/questions-...hlight=message

Best Regards,

Mark.
Showing Visitor Messages 1 to 10 of 14
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#### Basic Information

Age
41
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Inside my left nostril...
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Maths, fossil hunting, drum 'n' bass, and orange fruits (N.B. excludes oranges)
Occupation:
Semi-professional wind-bag
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England

#### Signature

Conjecture: Life is ridiculous.

Proof: $\displaystyle X-Factor \in \{Life\}$, and $\displaystyle X-Factor \in \{ridiculousness\}$

$\displaystyle \therefore\, \{ Life \} \cap \{ ridiculousness \} \ne \varnothing \quad Q.E.D.\, \Box$

$\displaystyle {\color{Blue}\mathscr{H}\mathfrak{e} }{\color{Fuchsia}\, = \, } {\color{RedViolet} \mathcal{MC}} ^{\color{OrangeRed}\mathsf{\, Scared !!}}$

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##### Visitor Messages
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June 8th, 2014 19:06
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September 16th, 2013

### 7 Friends

1. #### anemoneOffline

Paris la ville de l'amour

2. #### MarkFLOnline

Pessimist Singularitarian

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زيد اليافعي

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