Mathematics
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sigma
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All Questions Answers
Score Newest
question
15
A continuous bijection between two complete metric spaces that is not a homeomorphism.
Sep 11, 2018
question
12
Problem in the "proof" of Eisenstein's criterion on irreducibility.
Apr 29, 2018
question
9
Cardinality of the Set of all finite subset of $\mathbb{R}$
Dec 13, 2016
question
8
Whether $\Bbb{R}^3\setminus \{0\}$ and $\Bbb{R}^3 \setminus \{0,1 \}$ are homeomorphic or not?
May 15, 2019
question
8
$(\mathbb{Q},+)$ has no maximal subgroup.
Apr 22, 2018
answer
7
Intersection of infinite sets is infinite?
Jun 20, 2016
question
6
Is $\langle x^2+1, 5\rangle$ a maximal ideal in $\mathbb{Z}[x]$?
Jun 21, 2018
question
6
What exactly is "halving" a projection in a von Neumann algebra?
Dec 31, 2021
question
5
Question about continuous function.
Aug 21, 2018
answer
5
Show that $\lim_{z\to z_0}|f(z)|=\infty$ if and only if $z_0$ is a pole
Apr 3, 2018

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