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.)
In case you aren't joking, '□' is used to indicate the end of a mathematical proof. It's equivalent to q.e.d
I was not joking, which also probably explains why I have no idea what anything else in your post says.
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.
You beat me to it
i think this means that ∞ + ∞ > ∞
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?
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 = ∞
□
So the answer is □?
In case you aren't joking, '□' is used to indicate the end of a mathematical proof. It's equivalent to q.e.d
I was not joking, which also probably explains why I have no idea what anything else in your post says.
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.
You beat me to it
i think this means that ∞ + ∞ > ∞
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?
Sounds like the infinite hotel paradox
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Sounds like the infinite hotel paradox
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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
Yup, someone else commented it in this thread.
https://sh.itjust.works/comment/3777415