Recent content by Jabberwocky

That's great! Does this includes the Physics GRE (PGRE) in addition to the normal GRE?

What is your favorite writing tool and why? Do you prefer pen or pencil for doing math/physics and why? What about for normal writing? For awhile I've been using a Rotring 600 silver drafting pencil that was passed down to me, but I'm still not sure whether I prefer pencil or pen. I have...

Ah yeah -- now it clicks! Thank you! What you said makes perfect sense, since as the hour hand moves from say h to (h+1), the minute hand makes a full revolution. I'm just about to work out the solutions...

Ah yes I misread this. Exchanging has no effect when the positions are equal. But like Clever-Name and SammyS have also suggested, there appear to be many other exchangeable positions where the hands aren't equal. These are exactly the positions I was referring to! I believe based on the...

I may be misunderstanding you, but if the hour position equals the minute position then I think exchanging the hands will not yield a valid clock position unless the time is 12:00. Here's now I found that there's only one valid position. Let the number of minutes elapsed be denoted m. Then...

I was hoping some of the brilliant minds here might share their thoughts on the following puzzle: Definition. A valid clock position is exchangeable iff swapping the positions of the minute hand and the hour hand yields another valid clock position. Example. Midnight is an exchangeable...

Euler's equation is beautiful, but I think my favorite is Stokes' Theorem: Given a k-chain, M in \mathbb{R}^n and a k-1 form, \omega \in \Omega^{k-1}\mathbb{R}^n, \int_{M}d\omega=\int_{\partial M}\omega. All the classical theorems of div, grad, and curl, follow from this one elegant equation.

Wow! That's a lot of horsepower. The most I could afford and put to good use would probably be an oct core system or two quad cores. Eventually I'd like to upgrade to a cluster system, but I'm starting small.

Hey PF! Short First Post Intro: I've been a long time spectator here. I'm a junior undergrad physics major. PF has been a lot of fun, and tremendous help to me (like last winter I applied to many REU's). So thank you all! At the REU I'm in now, I'm learning linux. I'd love to hear any of...