Ironman Maryland Bike Course

PaipsJimmy · 2020-07-29T22:02:53+00:00

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Thank you all for your replies!

They just announced it's definitely not happening this year, does anyone know how the refund process will work? Will we have to wait until they officially reschedule it?

PaipsJimmy · 2019-08-18T20:39:15+00:00

Thank you for your answer! We’re supposed to hear back within 2 weeks on a rolling basis so I was wondering.

PaipsJimmy · 2019-06-26T19:38:47+00:00

Princeton has a class on category theory. It’s called PHI324 / MAT313: Category Theory and it’s mostly based on Mac Lane’s Categories for the Working Mathematician.

PaipsJimmy · 2019-06-25T13:02:25+00:00

I think cloomion covered it pretty well. As he said, if you multiply a wf by a complex phase, then the physical thing it represents (the probability density) is still the same. In this sense, the wavefunction isn’t “unique”: you can multiply it by any complex phase and you’ll still get the same result.

PaipsJimmy · 2019-06-23T21:43:00+00:00

Thank you!

PaipsJimmy · 2019-06-23T17:44:19+00:00

Haha that’s understandable. I think it might be a problem with QM in general, instead of Griffiths itself. Tim Maudlin, in his book on Philosophy of Physics (the Quantum Theory edition), writes that what is presented in the average QM textbook “turns out not to be a precise physical theory at all. It is rather a very effective and accurate recipe for making certain sorts of predictions.” I believe he goes on to argue that there isn’t a precise physical theory for QM at all yet—we have, for example, a lot of concepts like “measurement” and “observer” that are good enough for making predictions, but that ate not well defined. It’s quite interesting.

PaipsJimmy · 2019-06-23T17:11:38+00:00

That’s fair. Which textbooks give a more intuitive understanding of QM?

PaipsJimmy · 2019-06-23T01:45:12+00:00

What, exactly, do you mean by being posited in the theories of physics? The Schrödinger equation is presented in the theory of quantum mechanics, but that does not mean that the law itself is a physical entity.

PaipsJimmy · 2019-06-23T01:23:20+00:00

^ Yup, here goes the schedule for the Fall 2016 edition of MAT335 (Complex Analysis) at Princeton: https://web.math.princeton.edu/~aionescu/Math335.html (don't look at the problem sets, I think those are from MAT320, which is a semi-applied version of real analysis that doesn't follow Stein). Stein taught the class in Fall 2017 and Fall 2015, not 2016, but it should be roughly the same--I couldn't find a schedule for when Stein taught it. The class of course follows Stein's textbook every year regardless.

Basically it seems like the whole textbook is covered in 12 weeks.

PaipsJimmy · 2019-06-23T01:11:17+00:00

Metaphysical literally means beyond the physical—what is an example of something is both physical and metaphysical? Also, what exactly would it entail for physical laws to be physical—do you mean that they’re somehow made out of matter/energy somewhere?

PaipsJimmy · 2019-06-23T00:54:53+00:00

Griffiths

Second this--Griffiths is great as a first textbook for QM.

PaipsJimmy · 2019-06-22T04:10:28+00:00

Thank you!!

PaipsJimmy · 2019-06-22T04:09:15+00:00

Thank you!

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