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“A simple calculation” (feddit.org)

submitted 5 months ago* (last edited 5 months ago) by genfood@feddit.org to c/science_memes@mander.xyz

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~~Physics~~ Math be like…

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[-] LeFrog@discuss.tchncs.de 107 points 5 months ago* (last edited 5 months ago)

Its about a certain form of reinforced learning, called Temporal Difference Learning:

https://inria.hal.science/hal-00840470/document at page 11.

The calculation is called simple because it follows directly from the definitions above. Simple means more like "follows directly from definition without fancy math tricks", not " everyone who can read could solve this in 10 minutes".

I think this is also mostly math related, not physics?

I had a good laugh anyway. Good meme

[-] Septian@lemmy.zip 12 points 5 months ago

We've got the time dependent polar Schrödinger equation any time we want to pull out a ridiculous looking equation in pre-graduate level physics.

[-] bluemellophone@lemmy.world 1 points 5 months ago

Reinforcement learning is a machine learning (ML) technique (“AI” in layman terms) for optimizing neural networks and other types of non-linear models.

As far as ML math goes, this is fairly tame. It looks complicated, but is spelled out clearly in the paper. A lot of these kind of theoretical papers — things that would get published in Automatica — are going to lean very heavy on math.

Source: PhD in Computer Science with dissertation using neural networks.

[-] chemicalwonka@discuss.tchncs.de 63 points 5 months ago

Same feeling

1000019557

[-] tweeks@feddit.nl 7 points 5 months ago

I thought these were AI generated at first.

[-] wieson@feddit.org 5 points 5 months ago

Even worse are the ones that go super slow.

And now we pluck the 3rd string in the 5th fret with our thumb. Bum

The next step is to release the string and move over to...

[-] vonxylofon@lemmy.world 41 points 5 months ago

I work in documentation. We aren't allowed to use words like "simple" or "easy" precisely for this reason.

[-] HexesofVexes@lemmy.world 35 points 5 months ago

"We can trivially show that...'

Turns out, after a page of algebra, it wasn't "trivial".

[-] someacnt_@lemmy.world 9 points 5 months ago

When they say "It is obvious", they mean it is an exercise may take hours. At least it does not take days!

[-] sverit@lemmy.ml 5 points 5 months ago

Yadda Yadda Yadda, q.e.d.

[-] aubeynarf@lemmynsfw.com 25 points 5 months ago

That particular line looks like application of some rule or substitution of a term - on it’s own, simple

[-] marcos@lemmy.world 11 points 5 months ago

Yep. There's no rule, it's only variable substitution.

It's a really large substitution, touching several places and etc, but it's still simply variable substitution.

[-] EunieIsTheBus@feddit.de 24 points 5 months ago

This trivial result is left as an exercise to the reader.

[-] nova_ad_vitum@lemmy.ca 22 points 5 months ago

We should have never given physicists the alphabet.

[-] HappycamperNZ@lemmy.world 14 points 5 months ago

Let alone the Greek one as well

[-] Trail@lemmy.world 2 points 5 months ago

Yeah I'd rather have Kanji instead. You can better attach meaning to variables this way!

[-] HappycamperNZ@lemmy.world 1 points 5 months ago

At least I can read katakana....

[-] aeronmelon@lemmy.world 22 points 5 months ago

"Just a simple chord:"

plays Through Fire & Flames

[-] Treczoks@lemmy.world 20 points 5 months ago

That's what my son's homework from university looks like. I've done the same stuff about 35 years ago, but as I never used advanced algebra and analysis for my job, I've basically forgotten most of it.

At least I know roughly what my son is talking about. My wife (language teacher of German and English) is completly lost.

[-] Cap@kbin.melroy.org 18 points 5 months ago

My Casio watch calculator has none of those symbols so I don't think it is so simple.

[-] Jerkface@lemmy.world 10 points 5 months ago

Yeah, you'd need a whole-ass Power Glove for something like that.

[-] tacosanonymous@lemm.ee 18 points 5 months ago

My calc professor would say that stuff and be absolutely giddy despite rows of barely adults with confused faces looking at him.

[-] GlennMagusHarvey@mander.xyz 18 points 5 months ago

Math majors: "Duh."

Non-math majors: "And then a miracle occurs..."

[-] Leate_Wonceslace@lemmy.dbzer0.com 8 points 5 months ago

I'm a mathematician; that shit on screen ain't simple.

[-] FuglyDuck@lemmy.world 15 points 5 months ago

Whoever wrote that, could have taught law school with that kind of irony.

(“Brief” my ass.)

[-] Prunebutt@slrpnk.net 12 points 5 months ago

I think it says "simple" as due to not discourage the reader, 'cause it's probably a simple substitution in context which just looks complicated at first glance.

[-] A_A@lemmy.world 5 points 5 months ago

[rant] . All authors that often say things like : "we can simply do this or that" ... for me, is dismissive humble bragging. And, if they really wanted to encourage readers they would say : "in the following equation we used substitution" ... something descriptive.

Every time we study a new subject it is always difficult at first and seeing someone bragging, saying it is simple for them, is never encouraging.

[-] Prunebutt@slrpnk.net 3 points 5 months ago

Yeah, I guess you got a point.

[-] Console_Modder@sh.itjust.works 8 points 5 months ago

Thanks. You just gave me flashbacks to my college classes. I felt a shudder run down my spine

[-] wise_pancake@lemmy.ca 3 points 5 months ago

Stochastic differential equations?

[-] ms264556@beehaw.org 2 points 5 months ago

So uncomfortably true!

I recall spending a (large) number of weeks struggling through Elementary Stochastic Calculus, which had an incredibly misleading sticker on the cover proclaiming:-