- Thread starter
- Admin
- #1

- Feb 3, 2012

- 135

This is one of the best forum skins I've seen lately. Wonder who designed? Kudos to that person!

- Thread starter Greg Bernhardt
- Start date

- Thread starter
- Admin
- #1

- Feb 3, 2012

- 135

This is one of the best forum skins I've seen lately. Wonder who designed? Kudos to that person!

- Jan 29, 2012

- 661

Recommend it to your friends!This is one of the best forum skins I've seen lately.

- Admin
- #3

- Jan 29, 2012

- 661

And theI agree, this is by far the best looking math help forum I have ever seen.

- Admin
- #5

- Jan 26, 2012

- 4,041

@dethfire - We hired a designer from That1Design to do the work. He's amazing and it was the best money ever spent. He's ours though! Don't go using him too!!

- Admin
- #6

Wow! This is indeed a great compliment then! I had no idea we had such a dignitary here!...

Guys, we have been complimented by the owner/admin of one of the best forums on the net, physicsforums.com! It's a great compliment coming from Greg, who has been doing this for a long time. ...

- Thread starter
- Admin
- #7

- Feb 3, 2012

- 135

Thanks Jameson! It really is wonderfully unique and full of character!

@dethfire - We hired a designer from That1Design to do the work. He's amazing and it was the best money ever spent. He's ours though! Don't go using him too!!

No worries, at the moment my mind is preoccupied by the debacle that is vB5. But that deserves a whole other thread

Cheers!

- Admin
- #8

- Jan 26, 2012

- 4,041

I am not impressed with vB5 right now. Are you guys going to upgrade when it goes gold? I will be watching for sure to see that! Your forum is so fast and has millions of posts so I think scalability and speed must be primary concerns.Thanks Jameson! It really is wonderfully unique and full of character!

No worries, at the moment my mind is preoccupied by the debacle that is vB5. But that deserves a whole other thread

Cheers!

- Thread starter
- Admin
- #9

- Feb 3, 2012

- 135

Not a chance would I upgrade at Gold. I've been keeping track of the Beta's and I have yet to be impressed. The performance is terrible on the demo. Key features will be missing in Gold. URL structures are changing. They say redirects will be in place, but I can't trust that at the moment. I really don't know what they are doing. I've been mulling over whether to switch to IPB or Xenforo (the lawsuit still worries me). Either way, I'm staying put on 3.8 for the foreseen future and wait for the chips to land. It's a shame because I quite like 4.2, but it's now a dead end.I am not impressed with vB5 right now. Are you guys going to upgrade when it goes gold? I will be watching for sure to see that! Your forum is so fast and has millions of posts so I think scalability and speed must be primary concerns.

- Admin
- #10

- Jan 26, 2012

- 4,041

My thoughts exactly.Not a chance would I upgrade at Gold. I've been keeping track of the Beta's and I have yet to be impressed. The performance is terrible on the demo. Key features will be missing in Gold. URL structures are changing. They say redirects will be in place, but I can't trust that at the moment. I really don't know what they are doing. I've been mulling over whether to switch to IPB or Xenforo (the lawsuit still worries me). Either way, I'm staying put on 3.8 for the foreseen future and wait for the chips to land. It's a shame because I quite like 4.2, but it's now a dead end.

3.8.x is really stable and with some customization looks very close to 4.2.x, although some features might be missing. I like the look though on PF and don't think it looks outdated because it isn't vB4.

I'll look out for you guys making some kind of upgrade at some point. If you switch to IPB or Xenforo I'd really like to know your thoughts on it.

Take care, Greg! Thanks for stopping by. You're always welcome.

- Admin
- #11

- Jan 26, 2012

- 4,192

I'm just curious: are you still running 3.8, and the new PF look is more or less cosmetic only? Or did you upgrade/change software? If so, what are you running now? Any issues with the data migration?

- Thread starter
- Admin
- #12

- Feb 3, 2012

- 135

Hi Ackbach,

I'm just curious: are you still running 3.8, and the new PF look is more or less cosmetic only? Or did you upgrade/change software? If so, what are you running now? Any issues with the data migration?

It's purely cosmetic. No change in software. Using a lot more CSS. Feels good

thanks!

Greg

- Mar 4, 2013

- 188

- Feb 21, 2013

- 739

On top of skin where it says 'Petrus','notifications','settings' and 'log out' Then on left side it says 'MATH HELP BOARDS.COM' there is bunch of formulas like \(\displaystyle e^{i\pi}+1=0\). I try figoure out all formula but I cant figoure it out. The formula I wrote I know it from eulers formula

- Mar 22, 2013

- 573

The formulas I can understand are explicitly,

1. \(\displaystyle e^{i \pi} + 1 = 0 \)

2. \(\displaystyle \chi(S) = V - E + F\)

3. \(\displaystyle \sum_{k=1}^{\infty} \frac{1}{k^2} = \frac{\pi^2}{6}\)

#1 is by Euler's formula, #2 is probably the formula for regular polyhedra and #3 is well-known Bessel's theorem.

I don't know about the other two.

1. \(\displaystyle e^{i \pi} + 1 = 0 \)

2. \(\displaystyle \chi(S) = V - E + F\)

3. \(\displaystyle \sum_{k=1}^{\infty} \frac{1}{k^2} = \frac{\pi^2}{6}\)

#1 is by Euler's formula, #2 is probably the formula for regular polyhedra and #3 is well-known Bessel's theorem.

I don't know about the other two.

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- Feb 29, 2012

- 342

- Mar 22, 2013

- 573

I knew I have seen it somewhere before! Thanks for ringing the bell!$$L_X \omega = d(i_X \omega) + i_X d \omega$$ is the Lie derivative of a form.

- Moderator
- #18

- Jan 26, 2012

- 995

In particular, $\mathcal{L}_X\omega=d(i_X\omega)+i_Xd\omega$ is commonly known as Cartan's magic formula.

To reiterate, the equations in the banner are the following:

1. $e^{i\pi}+1=0$ (Euler's formula)

2. $\chi(S)=V-E+F$ (Euler characteristic of a surface)

3. $\displaystyle\sum_{k=1}^{\infty}\frac{1}{k^2}= \frac{\pi^2}{6}$ (solution to the Basel problem)

4. $\nabla \times \mathbf{E}=-\dfrac{\partial\mathbf{B}}{\partial t}$ (Maxwell-Faraday Equation [Faraday's law of induction] in a vacuum)

5. $\mathcal{L}_X\omega=d(i_X\omega)+i_Xd\omega$ (Cartan's magic formula)

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