this post was submitted on 29 Sep 2023
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[–] quindraco@lemm.ee 26 points 2 years ago (1 children)

Finally, we've solved math.

[–] Chariotwheel@kbin.social 17 points 2 years ago

Gura sure did.

[–] Chariotwheel@kbin.social 20 points 2 years ago* (last edited 2 years ago) (1 children)

"1, 2, 6? What happend to 3,4 and 5?"

[–] altec@midwest.social 12 points 2 years ago (1 children)
[–] PipedLinkBot@feddit.rocks 3 points 2 years ago

Here is an alternative Piped link(s):

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[–] mrfriki@lemmy.world 15 points 2 years ago

How to spot a creative mind

[–] yetAnotherUser@feddit.de 15 points 2 years ago (4 children)

What is ∞ + ∞?

Let x_n be an infinite, real sequence with lim(n -> ∞) x_n = ∞.

Let y_n be another infinite, real sequence with lim(n -> ∞) y_n = ∞.

Let c_n be an infinite sequence, with c_n = 0 for all n ∈ ℕ.

Since y_n diverges towards infinity, there must exist an n_0 ∈ ℕ such that for all n ≥ n_0 : y_n ≥ c_n. (If it didn't exist, y_n wouldn't diverge to infinity since we could find an infinite subsequence of y_n which contains only values less than zero.)

Therefore:

lim(n -> ∞) x_n + y_n ≥ lim (n -> ∞) x_n + c_n = lim(n -> ∞) x_n + 0 = ∞

[–] Waraugh@lemmy.dbzer0.com 13 points 2 years ago (1 children)
[–] yetAnotherUser@feddit.de 9 points 2 years ago (1 children)

In case you aren't joking, '□' is used to indicate the end of a mathematical proof. It's equivalent to q.e.d

[–] Waraugh@lemmy.dbzer0.com 4 points 2 years ago (1 children)

I was not joking, which also probably explains why I have no idea what anything else in your post says.

[–] yetAnotherUser@feddit.de 4 points 2 years ago

No worries, I made the comment mostly for people with somewhat advanced knowledge in math. A year ago I wouldn't have understood any of it either.

[–] spacesweedkid27@lemmy.world 6 points 2 years ago

You beat me to it

[–] ssfckdt@mastodon.cloud 5 points 2 years ago* (last edited 2 years ago) (1 children)

i think this means that ∞ + ∞ > ∞

[–] yetAnotherUser@feddit.de 6 points 2 years ago (2 children)

Not quite. It's somewhat annoying to work with infinities, since they're not numbers. Technically speaking, ∞ + ∞ is asking the question: What is the result of adding any two infinite (real) sequences, both of which approaching infinity? My "proof" has shown: the result is greater than any one of the sequences by themselves -> therefore adding both sequences produces a new sequence, which also diverges to infinity. For example:

The series a_n = n diverges to infinity. a_1 = 1, a_2 = 2, a_1000 = 1000.

Therefore, lim(n -> a_n) = ∞

But a_n = 0.5n + 0.5n.

And lim(n -> ∞) 0.5n = ∞

So is lim(n -> ∞) a_n = 2 • lim(n -> ∞) 0.5n = 2 • ∞?

It doesn't make sense to treat this differently than ∞, does it?

[–] Voroxpete@sh.itjust.works 3 points 2 years ago (1 children)
[–] PipedLinkBot@feddit.rocks 2 points 2 years ago

Here is an alternative Piped link(s):

Sounds like the infinite hotel paradox

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[–] ssfckdt@mastodon.cloud 0 points 2 years ago (1 children)

Wait, isn't there some thought experiment where you can insert infinity into infinity simply by moving infinity over by one infinite times?

I'm too lazy to look it up rn

[–] yetAnotherUser@feddit.de 1 points 2 years ago

Yup, someone else commented it in this thread.

https://sh.itjust.works/comment/3777415

[–] Ataraxia@lemmy.world 1 points 2 years ago

16 minutes to live.