Mathematics
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user371231
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All Questions Answers
Score Newest
question
13
Proof of a theorem on simultaneous diagonalization from Hoffman and Kunze.
Mar 13, 2017
question
8
Can the group $\mathbb Z \times \mathbb Z$ be written as union of finitely many proper subgroups of it?
Sep 26, 2019
question
7
Example of a commutative noetherian ring with $1$ which is neither domain nor local and has a principal prime ideal of height $1.$
Feb 25, 2017
question
6
There does not exist a onto ring homomorphism from $M_{n+1 \times n+1}(\mathbb F) \to M_{n \times n}(\mathbb F) $ for any field $\mathbb F.$
Aug 20, 2019
question
6
What is the dimension of $R[[X]]$ where $R$ is a Noetherian ring?
Dec 22, 2016
question
6
Rank $1$ bilinear form is a product of two linear functionals on a finite dimensional vector space.
Apr 9, 2017
question
6
A linear map $T: \mathbb{R^3 \to \mathbb{R^3}}$ has a two dimensional invariant subspace.
Jan 10, 2019
question
6
$A$ nilpotent and $A+c_iB$ is nilpotent then $B$ is nilpotent.
Jan 7, 2019
question
5
How can I show that $v_i\otimes v_j$ is non zero in $V \otimes_\mathbb {F}V$
Jan 26, 2017
question
5
Kernel of $\mathbb{Z}_p \to \mathbb{Z}/p^{n}\mathbb{Z}$ equals to $p^n \mathbb{Z}_p$.
May 23, 2020

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