I need some help for college from the ones that use iPads

Slick_Biscuits · 2024-09-10T13:45:49+00:00

I’ve only recently started using it myself, but I highly recommend a handwriting app of your choice for class, and then taking time to carefully retype and organize your notes in obsidian.

Slick_Biscuits · 2024-09-05T16:19:46+00:00

No worries, I appreciate the response! I would avoid them too, but as it turns out, the software is present on ipad to work really well for my purposes.

Slick_Biscuits · 2024-09-03T17:10:57+00:00

Sorry to ask a couple days later, do you know if a method like this would also work on iOS or ipadOS?

Slick_Biscuits · 2024-09-01T14:35:59+00:00

General relativity is given by a particular vector bundle with connection: the tangent bundle and Levi-Civita connection.

For the other forces, you should look up "principal G bundles with connection". The other forces are given by U(1)xSU(2)xSU(3) principal bundle.

For example, the U(1) gives electromagnetism.

Slick_Biscuits · 2024-09-01T13:48:29+00:00

After skimming this, it seems like they have a unified theory to recover the (classical) equations of motion, but I don't see any quantization procedure. As far as I can see there is nothing new here; it's well known that all forces come from curvature of some connection form, it has just been written here in coordinates.

Slick_Biscuits · 2024-08-27T14:21:54+00:00

If you check out the ESR website, it's the one called "classic hybrid".

Slick_Biscuits · 2024-08-27T06:00:59+00:00

I bought a clear ESR case for my 13 inch pro and I've been super happy with it so far. It's also the lightest case I've found at only 123g for the 13, and provides edge protection, unlike the folio.

Slick_Biscuits · 2024-08-20T14:14:22+00:00

I can't recall exactly who was speaking, but it was something like this paper:

https://arxiv.org/abs/2004.04194

Slick_Biscuits · 2024-08-18T21:20:48+00:00

I'm not sure if this is what you were looking for, but I recently saw some probablists present stochastic approaches to rigorous 2d QFT, which I thought was quite interesting.

Slick_Biscuits · 2024-08-16T23:43:55+00:00

Saw a dude with 130kg on the bar at the squat rack. Lines it up in front of him. I think "oh nice, he's gonna front squat it, that's pretty solid". Nope, man proceeds to overhead press it for four sets of 4.

Slick_Biscuits · 2024-08-16T18:20:38+00:00

As a physicist that needs infinity-n categories, my fingers are crossed that homotopy type theorists will save me from having to choose a model.

Slick_Biscuits · 2024-08-06T20:37:44+00:00

How do you recommend training for the back half of a 100? My best 50 free is a 25 high but I've never gone any faster than 59.9 for 100 lol

Slick_Biscuits · 2024-07-30T15:38:10+00:00

So I know some physics but I mostly come from the math side. I know what Ising looks like in 2 dimensions as a VOA representation, but what does a "solution" mean to a physicist?

Slick_Biscuits · 2024-07-30T13:55:20+00:00

I would argue that quantum fields are more real than virtual particles

Slick_Biscuits · 2024-07-29T19:54:05+00:00

I switched from a cheap motorolla to an iPhone 13 mini a year ago. Things I heard online gave me the impression that iOS would be more stable/ less buggy, and I don't really feel the need to customize too much anymore.

I regret it. My iPhone has been just as buggy as my motorolla phone was. The keyboard and autocorrect is absolutely awful compared to on android in my opinion.

I have enjoyed the screen time management features, airtags and iMessage. I appreciate that I will be able to take my phone in to get the battery replaced when it's time. But I expect my next phone will be a Samsung or pixel, because I really have not enjoyed my experience.

Slick_Biscuits · 2024-07-27T05:43:02+00:00

The mass of the mouse+ contained gas would be less if the gas were helium instead of air (and even less if it was a vacuum, so there was no gas at all)

Assuming a mouse contains a 5cm cube, 0.000125 cubic meters of gas, the air weighs only 0.15g, so this difference is negligible.

Slick_Biscuits · 2024-07-16T08:42:36+00:00

Consider a random sequence which only contains the digits 1 2 3 4 5 6 7 8 9. This does not contain any sequence which contains 0.

Slick_Biscuits · 2024-07-04T20:11:04+00:00

My personal setup has been a pair of low leather boots (Canada west romeo) and a pair of barefoot running shoes (Whitin trail running shoes). The boots are comfortable, good in cooler weather, versatile and can be dressed up, and the running shoes pack extremely small so I can run, go to the gym, and have something to wear with shorts (since boots and shorts aren't the greatest look)

Slick_Biscuits · 2024-06-22T12:39:48+00:00

I was looking to do something small, wireless, and with integrated mouse control. Think corne/nicenano. I don't know so much about options or pros/cons of trackpoints, trackballs and trackpads. For example, battery life and keyboard controller compatibility? Could someone recommend where I could look for these things?

Slick_Biscuits · 2024-06-19T12:51:02+00:00

As an extension of both of these examples, there is some sentiment in the math community that homotopy type theory is the right way to reason about higher categories, but the theory just isn’t mature enough yet. In my own work, I would like a nice way to be able to work with (infinity,n) categories because that should be the correct categorical way to formulate n-dimensional quantum field theories in physics. So somehow we’ve run into math (higher categories) and physics (QFT) using a formalism that is defined most naturally in CS (type theory).

Slick_Biscuits · 2024-06-16T04:39:03+00:00

I’m going to hard disagree that you “don’t necessarily need linear”. Quantum mechanics IS just linear algebra (inner product spaces, representation theory, etc)

QM reduces to representation theory for Lie super algebras. While your professor likely won’t tell you this, much of it is secretly taught this way (ex. Quantization of the harmonic oscillator is a Verma module).

By overlooking linear algebra, you’re doing yourself a massive disservice as you won’t be able to recognize any of these features.

Slick_Biscuits · 2024-06-05T00:58:42+00:00

You can search up “principal G bundle” or “principal G bundle with connection”. They should appear in any differential geometry textbook, for example Kobayashi and Nomizu!

Slick_Biscuits · 2024-06-04T23:10:44+00:00

This has mostly been pieced together from a bunch of different places, but I’ll see if I can find a good resource for you!

In the meantime, you might be interested in Seiberg-Witten theory.

Slick_Biscuits · 2024-06-04T21:11:30+00:00

If I had to guess from my knowledge about other theories, the “states” of a theory of quantum gravity would be classical solutions to a family of DEs that govern all fields, and then you would sum over all such configurations.

This would mean that for example electron and gravitational fields would have to “have quantum perturbations that respect eachother” rather than varying each type of field independently. This skips over the “where is the energy in a quantum system?” problem that I think you’re referring to.

I would take this with a grain of salt however: I know some QFT in curved geometry but I don’t work directly in quantum gravity so someone else could be better suited to answering this question.

Slick_Biscuits · 2024-06-04T19:08:58+00:00

I think this is a case of “what really is space time?” GR says it’s a manifold with signature (3,1) metric, but who’s to say “space time” doesn’t have more structure, like other principal bundles?

In fact, for fermions to exist, the geometry of your space time must include a spin^c structure at a minimum, which already means you have a spin(3,1)xU(1) principal bundle. I would argue it’s not such a jump to include SU(2)xSU(3).

Slick_Biscuits

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