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user91132
  • Member for 14 years, 7 months
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I'm interested in non-commutative algebra, representation theory and applications of these topics to algebraic number theory.

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29
When is $\ker AB = \ker A + \ker B$?
Nov 5, 2011
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21
How to memorise (understand) Nakayama's lemma and its corollaries?
Apr 13, 2011
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17
Explicit ring of differential operators for polynomial algebras over the integers?
Feb 28, 2011
answer
13
non commutative polynomial which is zero for all matrix evaluation
Nov 27, 2015
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13
Non-commutative reduced rings of order $p^2$
Sep 9, 2013
answer
13
Annihilators in Matrix Rings
Jul 13, 2012
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11
For $G=\mathbb{Z}^2\rtimes \mathbb{Z}$, $Spec(\mathbb{Z}G)$=?
Sep 1, 2013
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10
How to work with co-multiplication?
Feb 28, 2011
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10
$\mathcal{D}$-modules of level m
Sep 13, 2012
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9
ad-nilpotent degree of a nilpotent Lie Algebra
May 20, 2011
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116
Can $18$ consecutive integers be separated into two groups such that their product is equal?
12
If $p\in R[X_1,\dots,X_n]$ is irreducible, is it still irreducible in $R[X_1,\dots,X_n,\dots,X_N]$?
9
Commutative artinian ring is noetherian
8
Proof that a matrix is nonsingular
7
Functors Between Functor Categories