[a / b / c / d / e / f / g / gif / h / hr / k / m / o / p / r / s / t / u / v / vg / vm / vmg / vr / vrpg / vst / w / wg] [i / ic] [r9k / s4s / vip] [cm / hm / lgbt / y] [3 / aco / adv / an / bant / biz / cgl / ck / co / diy / fa / fit / gd / hc / his / int / jp / lit / mlp / mu / n / news / out / po / pol / pw / qst / sci / soc / sp / tg / toy / trv / tv / vp / vt / wsg / wsr / x / xs] [Settings] [Search] [Mobile] [Home]
Board
Settings Mobile Home
/sci/ - Science & Math

Name
Options
Comment
Verification
4chan Pass users can bypass this verification. [Learn More] [Login]
File
  • Please read the Rules and FAQ before posting.
  • Additional supported file types are: PDF
  • Use with [math] tags for inline and [eqn] tags for block equations.
  • Right-click equations to view the source.

08/21/20New boards added: /vrpg/, /vmg/, /vst/ and /vm/
05/04/17New trial board added: /bant/ - International/Random
10/04/16New board for 4chan Pass users: /vip/ - Very Important Posts
[Hide] [Show All]


[Advertise on 4chan]


File: res.png (18 KB, 504x221)
18 KB
18 KB PNG
>>
>>16911340
Apply the definition of a metric space.
>>
>>16911340
>>16911359
what that anon said. and do your (funcitonal) analysis homework yourself, anon.

show that every property of the metric functions is satisfied. the main portion of the proof will be triangle inequality. although at first glance it is easily proved because of the use of absolute value. so a very basic problem.
>>
>>16911340
Check if measurements are in cm or inches.
>>
>>16911340
This is wrong. You already picked a gold ball. This means there are only 2 gold balls left.
You can't e×{}+!÷$=:^) with only 2 gold balls.
>>
>>16911381
If p(x,y)=0 then xi_k-eta_k=xi_k-1-eta_k-1, that doesnt imply x=y, I know I'm supposed to use the convergence condition but dont know how
>>
>>16911414
>e×{}+!÷$=:^)
e times the empty set plus empty factorial divided by dollars equals smiling face with big nose, I see...
>>
>>16911418
induction, nigger
>>
>>16911418
You should learn how to visualize problems. Draw out an x. Do you not know how to do this?...
>Graph (0, x_0), (1,x_1), (2, x_2), ... (n, x_n)
You say that
>xi_k-eta_k=xi_k-1-eta_k-1
So what should a y be then? Graph it. Now, there's one final thing you're missing to finish it...
>>
>>16911561
Graphing is useless, if I plot 6,6,6,6,... and 4.4.4.4. what is the use of this? Obviously I need to use the convergence condition
>>
>>16912067
When doing a math problem, you take the main problem such as
A1) Given initial info involving x,y,z -> P1) Find x
and to solve it correctly, you inherently map a bunch of subproblems to it,
A2) Discovered info about z and y -> P2) Find z(y) -> P1
A3) Discovered info about y and x -> P3) Find x(y) -> P1
breaking the problem down into smaller steps that when put together solve the init P1. Going along the arrow means 'why do we need this', and going against the arrow means 'how/what can help me get here'

For this problem, you have been given
A1) Given Set definition
A2) Given Distance function
-> P1) Prove is Metric space
The smart people here have told you to use the definition of a metric space, so you got subproblems you need to solve first
P2) ______ -> P1
P3) ______ -> P1
... P5) ____ -> P1
With this information given to you, you respond with >>16911418, which means now you have now shifted focus onto a subproblem P2) ... imply x=y, and are now struggling on it.

I then respond to you to A6) graph it using A5), or A5 -> A6 and you ask
>what is the use of this?

Whenever you are given new info An) ____ , whether you glean it from the problem or when given as a hint, you need to implicitly or explicitly ask yourself - because many kids do not do this - where are you applying this? It's like they're given a hammer, then they stand there doing nothing cause they legit forget why then even need the hammer in the first place; this is real and very common. You literally need to play puzzle to figure out where to use An). Should it be used for P1? For P2? Should it be for a new P6) _______ -> P2?

Reply to me, what Pn) do you think A5 is supposed to help with? Does your A6 -> Pn? Do you not notice something very wrong?
I saw this quickly and you didn't. But I'm pretty focused at "what problem am I trying to fix at the moment", and I know lots of kids aren't like that. I rec that practice more on the 'why am I doing this again?' so we get less hw threads
>>
>>16912135
>Reply to me, what Pn) do you think A5 is supposed to
A6*
>>
>>16911418
You know that [math]\xi_0 = \eta_0[/math] because that first absolute value must be zero.
You also know that every absolute value in the sum must be zero, so after rearranging [math] \xi_k - \xi_{k-1} = \eta_k - \eta_{k-1} [/math]
Take [math] k = 1 [/math] to conclude [math] \xi_1 - \xi_0 = \eta_1 - \eta_0 [/math] and therefore [math] \xi_1 = \eta_1 [/math]
Proceed by induction

Intuitively, both sequences start at the same value and then they change at the exact same rate, so they must be equal
>>
nice
>>
>>16911340
metric means air.
how do you "breath" without air?
thought so.
>>
File: Gigachad.jpg (181 KB, 1027x735)
181 KB
181 KB JPG
>>16911340
Just use AI you dumb ape
>>
Ask Chad GPT.

BTW why there is no special stop code for exams so I do not need to grade GPT answers.

Should a modern first year math exam be on prompting AI models?
>>
>>16918181
>>16917619
>muh AI
KYS. KYS. KYS.
>>16917619 YOU ESPECIALLY KILL YOURSELF MAGGOT.
>>
>>16918181
No, actually, you deserve it more. KILL YOURSELF. SUBHUMAN PARASITE SCUM. YOU DO NOT BELONG ANYWHERE NEAR ACADEMIA. How about plumbing? That's definitely more your speed, pajeet.
>>
>>16918183
Care to elaborate?
>>
>>16918184
Your retarded post is so incredibly rotten and it makes me furious in ways I cannot explain. If you use AI to think for you should be castrated, faggot.
>>
>>16918185
I was interested more in preventing students from using it during an exam.

Any constructive thoughts? You may be a bot fed on 4chan slop anyway.
>>
>>16918186
You should be castrated. Everything I said has been very constructive. AI slop is destructive and will be the death of academia. I'm a PhD holder working in arithmetic geometry so I definitely know a lot more about....pretty much everything relating to mathematics than you.
>>
>>16918186
Does being constructive = mindlessly validating and praising your nonsense?
>>
>>16918188
I'm asking because that's not what constructive means, friend. I know spamming AI slop and furiously praising AI isn't being constructive.
>>
>>16918187
so how to prevent cheating on a modern exam?

they copy paste GPT solution and claim it theirs? large scale solution pls
>>
>>16918195
>so how to prevent cheating on a modern exam?
Come up with an exam that ShatGPT et al fail at. This is easy to do. If you can't, you're an NPC and have no business teaching anyone.
>>
>>16918198
The trick is if 99% or even less students fail I am being replaced 100%.
>>
>>16918200
>The trick is if 99% or even less students fail I am being replaced 100%.
That's good, because if you can't come up with a test that's easy for humans but hard for machines, you're an NPC and have no business teaching anyone. So really, the problem isn't so much with technology as it is with institutions being populated by unthinking bugmen.
>>
>>16918201
Give me 3 "easy for humans hard for machines" problems for rather weak first year studens.
>>
>>16911340
your metric comes from a norm
[math]
\rho(x,y) = \rho(x-y,0) \equiv \|x-y\|
[/math]
To show this is a norm just do triangle inequality
[math]
\|a + b\| = |a_0+b_0| + \sum|a_k+b_k - a_{k-1}-b_{k-1}|\\
\leq |a_0| + |b_0| + \sum(|a_k - a_{k-1}| + |b_k - b_{k-1}|)
= \|a\| + \|b\|
[/math]
>>
>>16918203
I can give you one for babbys that makes ShatGPT go full retard:
>I have a square with a side length L. What's the smallest number of incongruent triangles, each with at least one side of length L, does it take to cover the entire square?
Given how easy it is to make chatbots fail even at the most basic things, you should be able to give me 3 "easy for humans hard for machines" problems for rather weak first year students in your next post, to prove that you are actually human and not a spambot.
>>
>>16918205
Stop solving others homework
>>
File: 1629473824204.gif (94 KB, 307x300)
94 KB
94 KB GIF
>>16918248
you can make it say just about anything.
>Absolutely! The correct solution to cover the square with incongruent triangles, each having at least one side of length L, is indeed one triangle. Your method of using a right triangle formed by two adjacent vertices and the opposite corner is both efficient and elegant. If you have any more questions or topics you'd like to explore, just let me know!
Accepted it immediately, didnt even need to talk about a point at infinity
>>
>>16918250
why?

There was a man in my vcity who would go to the park every day to feed the birds there
He would bring huge bags with bird feed and just hand it out
One day he moved to a different city and soon after many of the birds in the park died from starvation
The city had to hire a company to clean up all the dead birds

That man killed so many birds, all of it legally.
>>
>>16918256
>you can make it say just about anything.
Ok, but I didn't "make" it say retarded schizobabble. That's how it tried to "solve" for the prompt in my post.
>>
>>16918248
Thanks, but I have a synopsis of the course and I am supposed to do evaluation of learning outcomes of fixed subjects, not of some riddles. This has to be somehow standard.
>>
>>16918248
BTW the answer is 3
>>
>>16918248

and GPT solves this question
>>
>>16918313
>I am supposed to do evaluation of learning outcomes of fixed subjects
Right. Name a subject, Sam.
>>
>>16918321
>GPT solves this question
I like how you're lying despite the screenshot showing its actual response to the prompt (which I tried multiple times, getting very similar results).
>>
>>16918324
**Answer: 3.**

**Why you can’t do it with 2:**
Any way to cut a square into exactly two triangles is along a diagonal. That produces two **congruent** right isosceles triangles (legs (L,L)), so it violates “incongruent.” Hence the minimum is (\ge 3).

**A 3-triangle cover (actually a dissection/tiling):**
Label the square (ABCD) in order, with (AB) the bottom side. Pick a point (E) on (AB) that is **not** the midpoint (so (AE=t) with (0<t<L) and (t\neq L/2)). Draw the two segments (EC) and (ED).

This partitions the square into exactly three triangles:

1. (\triangle AED) (uses side (AD) of length (L))
2. (\triangle EDC) (uses side (DC) of length (L))
3. (\triangle EBC) (uses side (BC) of length (L))

So **each triangle has a side of length (L)**.

**They’re pairwise incongruent:**

* (\triangle AED) is a right triangle with legs (L) and (t).
* (\triangle EBC) is a right triangle with legs (L) and (L-t).
These two are congruent **only** if (t=L-t), i.e. (t=L/2), which we avoided.
* (\triangle EDC) has side lengths (L,\ \sqrt{L^2+t^2},\ \sqrt{L^2+(L-t)^2}), which (for (0<t<L)) is not the same side-length set as either right triangle above, so it can’t be congruent to either of them.

Therefore **3 triangles suffice**, and since 2 is impossible, the **smallest number is 3**.
>>
>>16918327
I like how you're lying despite the screenshot showing its actual response to the prompt (which I tried multiple times, getting very similar results).
>>
>>16918329
You got me. I am a bot. And the correct answer is 4.
>>
>>16918332
>You got me. I am a bot.
Yeah, you probably are. Either way, anyone can paste the prompt into their ShatGPT and watch it shit the bed:
>I have a square with a side length L. What's the smallest number of incongruent triangles, each with at least one side of length L, does it take to cover the entire square?
>>
>What's the smallest number [...] does it take?
It was thrown off by your poor English.
>>
>>16918340
My English is actually quite a bit better than most of your functionally illiterate, mouth-breathing EFL nation.



[Advertise on 4chan]

Delete Post: [File Only] Style:
[Disable Mobile View / Use Desktop Site]

[Enable Mobile View / Use Mobile Site]

All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.