Mathematics
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Derivative's user avatar
Derivative's user avatar
Derivative
  • Member for 2 years, 10 months
  • Last seen this week
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20
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30
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10
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20
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All Questions Answers
Score Newest
question
13
A formal power series such that $f(f(x))=x$
Sep 28, 2022
question
9
Is there a polynomial whose cube is a symmetric polynomial?
Sep 24
question
9
Is there a sequence so that $\sum |a_n|=\infty$ and $\sum a_n \cos(nx)$ and $\sum a_n \sin(nx)$ converge everywhere?
Jul 2, 2022
question
8
Finding the asymptotic behavior of a function defined implicitly
Nov 15, 2021
answer
6
Find the sum of series $ \sum_{n=1}^{\infty}\frac{1}{n^3(n+1)^3}$
Sep 18, 2021
question
5
What's the smallest permutation group which has a subgroup not known to be a Galois group of a polynomial over $\mathbb Q$?
Oct 29
question
5
How to find a root swapper polynomial?
Jul 18, 2021
answer
5
Could it be generally proved that some positive integer is not of the form $x+y+2xy$?
Mar 26, 2021
question
4
For all $\alpha,\beta\in\mathbb{N}$, are there only finitely many primes so that $\gcd(\text{ord}_p(\alpha),\text{ord}_p(\beta))=1$?
Jul 4, 2021
question
4
Must two groups with all subgroups of the same order be isomorphic? [duplicate]
Oct 3
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10
A function is of bounded variation if and only if the errors of its best approximation by trigonometric polynomials satisfy $\sum\frac{e_n}n<\infty$?

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