TIL (I had to look it up).caz said:And once again Godwin’s law stands
TIL(me too).berkeman said:TIL (I had to look it up).
Bystander said:TIL(me too).
There is no LaTeX Guide on Facebook. QED.JT Smith said:
NO, NO, and NO. Well, OK, maybe a lot has but some of us have NOT.JT Smith said:
Facebook. . . ??I'll have to look that up. . . .JT Smith said:
Me too, perhaps people here feel threatened by their brother-in-law’s deep scientific insightsJT Smith said:
Is the alternative just some value that ##f## approximates for sufficiently small values of ##\theta##?ergospherical said:Yay, you are a physicist!although the second one ought to be ##\dfrac{1}{2}R^2 \sin{2\theta}##
(the alternative answer was ##r\theta##
... when there's a change of variables ##\tilde{f}(\mathbf{u}) = f(\mathbf{x}(\mathbf{u}))##, it's common (at least in applied mathematics...) to not distinguish notationally between ##f## and ##\tilde{f}##I remember Usenet. Every unmoderated group degenerated into a cesspool. The first of many disappointing discoveries about the nature of some people.JT Smith said:
+1 on that. For keeping up w/ remote grandkids it's great. For science it's just a joke.Hornbein said:
"Farcebook?"OCR said:
Possibly interesting reading:jedishrfu said:
ergospherical said:That reminds me, here's a test to see whether you're a physicist or a mathematician at heart...
if ##f(x,y) = xy##, what is ##f(r,\theta)##?
Just to take a tangent, do you know how to tell if someone is a plumber or a chemist?ergospherical said:
ergospherical said:That reminds me, here's a test to see whether you're a physicist or a mathematician at heart...
if ##f(x,y) = xy##, what is ##f(r,\theta)##?
Yes, a perfect illustration. Once again the Mathematicians are correct, exactly, precisely correct. But the people that need to use the math to solve problems leave out the tedious rigour only retaining the essence that is useful and tailored to their particular field. Then they add in, but don't talk about, some jargon or assumptions that are always made by their peers. Which is why none of us find it easy (or possible) to read the papers from the "other guys". I think it's actually a pretty efficient system. There are good reasons that people take shortcuts, you know, the good ones anyway.fresh_42 said:
Oh, I get it. In the case of ##\tilde{\mathbf{f}}##, you use the substitution ##x=r\cos\theta,y=r\sin\theta##, but in the case of ##\mathbf{f}##, you just substitute ##x=r,y=\theta## without making any allusions whatsoever to polar coordinates.ergospherical said:
My spell checker is set on "American". You cannot imagine how many "u"s I've deleted thru the years. I'd say there is a u in it, at least as long as you don't clean up the more important mess. Otherwise, we may start calling it Pittsborough.vela said:
You mean there are no shortcuts to mathematics?vela said:Favorite misconception: The short version of mathematics is maths.
How about ##f(\pi, \tau)##? I think some will assume ##\pi## is just a symbol.robphy said:
Bystander said:
Damn, I now feel so foolish. . .So wait, is the spherical coordinate system I learned in engineering calculus different than what physicists use? We learned ##\rho## ##\phi## ##\theta##.PeroK said:
Well, what about the order of evaluation? I learned it a certain way, and have never thought differently about it. But there is certainly more than one way to skin a cat.Office_Shredder said:
I prefer whichever way makes the solution easier. Mind that you do have to do it correctly. But you really ought to be comfortable with multiple ways so you can choose the best.valenumr said:
This only happens to famous skeletons, and only if someone who is alive starts it!rsk said:
Sorry, what's that? (maybe the first one on the list below?)rsk said:
I had the same question. But then I decided that International Plumbing Code perfectly fits.berkeman said: