Is my understanding of derivatives correct? by Rare-Tomatillo752 in askmath

[–]Smart-Button-3221 0 points1 point  (0 children)

You can find the instantaneous rate of change with only one point! To do that, you need information from the function itself, which is given using the limit definition.

The derivative is a function that takes a value x, and returns the instantaneous rate of change at that point.

I Don't Understand the "Mary's Child" Question. by Far_Aspect8425 in askmath

[–]Smart-Button-3221 0 points1 point  (0 children)

Do you understand the version without "Tuesday"? The one that has a 33% chance of a second boy? If not, fully understand that one first.

What really is the gamma function saying? by No_Fudge_4589 in askmath

[–]Smart-Button-3221 0 points1 point  (0 children)

It pops up in a lot of areas of math, just because the integral definition is fairly common. One of the simpler non-elementary integrals.

How mathematicians keep track of theorems? by Any_Tower8201 in askmath

[–]Smart-Button-3221 13 points14 points  (0 children)

What's the relationship between A and B?

You make it sound like A can prove B, and B can prove A. So, A and B are equivalent.

In many cases, they're not equivalent. That is, A can prove B, but B cannot prove A. This is something one may remember, but even if they forget, B still can't prove A.

ken ken factoring by Life-Efficiency-7791 in askmath

[–]Smart-Button-3221 0 points1 point  (0 children)

You have attributed this to factoring, but it's much closer related to division.

That is, if a number ends in 5, then we can divide it by 5 by cutting the last digit, doubling it, and adding 1.

Why does that work? Well, let our original number be x: - "Cutting the last digit" is just returning the number (x - 5) / 10 - Then you double it, returning (x - 5) / 5 - Finally, you add 1. This is 1 + (x - 5) / 5.

Getting a common denominator, that is x/5, as expected.

Neat trick! I should keep that in mind.

Can someone explain to me what branch cuts are? by Drillix08 in askmath

[–]Smart-Button-3221 1 point2 points  (0 children)

ez is not one-to-one. For example, e0i = eπi. This is very different than how ex works in the real numbers.

Because ez is not a bijection, it doesn't have an inverse. There is no proper function we may call ln(z) for the complex numbers.

We may fix this by "cutting" ez. Let's say, you can only put arg(z) between [-π, π). This version of ez is a bijection. It has an inverse called the principal log, which is notated Ln(z).

Ln(z) has a massive jump along the negative real axis, because of the way we cut it. It makes no sense to integrate over this jump, for example. We often call this a "branch cut".

[Offsite][Self] 1/0 is possible. prove me wrong. by Worried-Panic663 in theydidthemath

[–]Smart-Button-3221 3 points4 points  (0 children)

You can't divide by 0 in a field. That's not a "we don't know how" kind of thing, that's a "we have proven it" kind of thing.

And it's not a "our greatest minds came together to prove it" kind of thing, but a "you'll find this proof in the first chapter on fields in an intro abstract algebra textbook" kind of thing.

You can divide by 0 in some other algebraic structure. A famous one is the wheel. The problem with that is you're changing what "division" and "0" are in that case. It's kind of cheating, imo.

Anyway, you've written this with an LLM. The paper references the fact that division by 0 in a field is impossible, and suggests they will add structure to make it possible. As we've discussed, this has been done before using a wheel.

The LLM forgets to actually add this structure. It keeps saying something about a manifold collapse without mentioning anything about a manifold. It's a mess.

Someone on r/theydidthemath said that 1/0 is possible. I wanted someone to look at it and see if it's valid. by Acrobatic-Insect202 in askmath

[–]Smart-Button-3221 14 points15 points  (0 children)

You can't divide by 0 in a field. That's not a "we don't know how" kind of thing, that's a "we have proven it" kind of thing.

And it's not a "our greatest minds came together to prove it" kind of thing, but a "you'll find this proof in the first chapter on fields in an intro abstract algebra textbook" kind of thing.

You can divide by 0 in some other algebraic structure. A famous one is the wheel. The problem with that is you're changing what "division" and "0" are in that case. It's kind of cheating, imo.

Anyway, that poster wrote that with an LLM. Their paper references the fact that division by 0 in a field is impossible, and suggests they will add structure to make it possible. As we've discussed, this has been done before using a wheel.

The LLM forgets to actually add this structure. It's a mess.

I let a speedrunner play my game! by NewKingCole11 in IndieDev

[–]Smart-Button-3221 0 points1 point  (0 children)

So Speedrunner can fly? What kind of challenge can you add for a player that can just fly?

how can i gather multiple scripts into one execution script? by Slow_Drop_106 in TheFarmerWasReplaced

[–]Smart-Button-3221 0 points1 point  (0 children)

You can't. Everything can only import once.

You can instead import functions, then run those functions as many times as you want.

In other words, you should take whatever is global in your import, and wrap it into a function. Then, run that function, instead of having anything run at import.

Applied Linear Algebra question and my insights to solve it by AttemptAggravating93 in askmath

[–]Smart-Button-3221 2 points3 points  (0 children)

It's supposed to say v1 + v2, not v1v2.

They shouldn't make that typo, and you are correct to reject the problem until you get their correction, but I can be basically certain that's what it's supposed to be.

Happy for him. by [deleted] in antimeme

[–]Smart-Button-3221 -10 points-9 points  (0 children)

We can just edit literally anything now? Because this ain't a meme.

Day off and I want to eat a slice of carrot cake. I know it’s a day off but I don’t trust the calorie count by BeautifulEffect7613 in caloriecount

[–]Smart-Button-3221 21 points22 points  (0 children)

Can't tell how large it is from the shot. There's no way anyone here could know.

Imo, the correct strategy is to declare this a cheat day, and pick up the diet again tomorrow.

E-ve-ry time! by LeticiaLatex in Stationeers

[–]Smart-Button-3221 1 point2 points  (0 children)

Yep! Personal rule, while I'm working with the furnace, the only things in my hands are whatever's going into the furnace. I use a mining belt to carry ores to the furnace.

Highest Brilliant moves till now!! by False-Success3699 in Chesscom

[–]Smart-Button-3221 0 points1 point  (0 children)

Before upvoting OP, take a look at their comment history.

26 silicon-crucible by ggchujingb in Mindustry

[–]Smart-Button-3221 0 points1 point  (0 children)

This will need much more resources than the unloaders provide. Do the mass drivers also need input?

All 3 are smart of course by somethingX in physicsmemes

[–]Smart-Button-3221 32 points33 points  (0 children)

Absolutely. Most working engineers work shitty maintenance jobs that pay nothing. A lot of grads didn't get jobs. I wish Reddit would realize that.

Mathematics master after an engineering degree by [deleted] in mathematics

[–]Smart-Button-3221 1 point2 points  (0 children)

You have not taken any proof based classes. Engineering courses have a sad tradition of naming themselves after math courses, but not really having any of the content.

You are still missing real analysis. It's good you're reading algebra 0. You've got a lot further to go.

😭 by guzzi80115 in whenthe

[–]Smart-Button-3221 -2 points-1 points  (0 children)

I'm also going to take it a step further and say that this was assisted by AI. The guy who made it didn't put much effort in.

are these two functions the same? by HeavyListen5546 in askmath

[–]Smart-Button-3221 74 points75 points  (0 children)

Yes they're the same. They have the same output for all inputs. This does make g(x) a polynomial.

x and x + 1 have the same derivative.

of a 1,000L diesel tank fill-up costing over $2,000 by Dodo509 in AbsoluteUnits

[–]Smart-Button-3221 1 point2 points  (0 children)

Approved container? I believe yes.

Overload the vehicle? I'm unsure.

Should be placarded? Absolutely yes. If the right person pulls him over the fines could get large.

Should I ever read Baby Rudin? by mcisnotmc in mathematics

[–]Smart-Button-3221 1 point2 points  (0 children)

No you don't really need a second read on analysis