Mathematics
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Tipping Octopus
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A tool the universe made to destroy itself

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All Questions Answers
Score Newest
answer
18
Can a Cauchy sequence converge for one metric while not converging for another?
Apr 5, 2019
answer
6
Is there a non-constant function $f: \mathbb{R}_{>0} \to \mathbb{R}$ such that $f(x) = f(x + 1/x)$?
Dec 10, 2020
question
6
Direct Proof that Artinian Rings have Stable Range 1
Jan 18
answer
6
Find the sum of the series $\sum_{n=1}^{\infty} \frac{2n+3}{n(n+1)(n+2)}$
Nov 14, 2018
answer
5
Limit of sum of areas of infinite amount of triangles
Aug 18, 2019
answer
4
Functional equation which only has constant functions: $f(x)+2f^2(x^2)-1=0,\forall x\in (1,+\infty)$
Dec 27, 2018
answer
4
Prove that the sum of derivatives of a non-negative function is non-negative
Feb 12, 2021
answer
3
Degree of the extension $\mathbb{Q}(\sqrt[5]{7}+\sqrt[5]{49})$
Apr 30, 2021
answer
3
Prove that there exist $135$ consecutive positive integers so that the $n$th least is divisible by a perfect $n$th power greater than $1$
Mar 19, 2019
answer
3
True or False:Let $X$ be a topological space such that any two nonempty openset in $X$ intersect, then $X$ is compact.
Dec 3, 2018
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37
Make 6 5 4 3 = 81
26
(A → B) → (¬B → ¬A)
7
Inserting digits to satisfy equation
7
Are you a probabilist or a physicist?
5
Why is "xiang4" in 摄像 and 照相 different from each other?

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