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Sam Williams's user avatar
Sam Williams's user avatar
Sam Williams
  • Member for 7 years, 3 months
  • Last seen more than 6 years ago
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Top posts
question
7
When is $GL_m(R)$ generated by elementary and diagonal matrices?
Dec 27, 2016
question
7
What does $K_1(R)$ tell us about $GL_n(R)/E_n(R)$?
Dec 30, 2016
question
7
Role of stably free modules in algebraic geometry
Mar 7, 2018
question
4
If $\{f\in R[x]\:|\:f\text{ monic}\}$ is a right denominator set, is $\{f^i\:|\:i\geq 0\}$ a right denominator set also?
Aug 3, 2017
question
3
For $T$ the $2\times 2$ triangular matrices over $R$, can we write $GL_2(T)=U(T)E_2(T)$?
May 15, 2017
question
2
Localising a right Noetherian ring at a set of regular elements
Jan 28, 2017
question
2
Does $A\oplus M_n(R)\cong B\oplus M_n(R)$ imply $A\cong B$? $R$ Dedekind domain
Jan 17, 2018
question
1
Under what condition can any $X\in GL_2(R)$ be reduced to a triangular matrix?
Jan 2, 2017
question
1
When is genus the same as stable equivalence?
Oct 30, 2017
question
0
Right localization of $R[x,x^{-1}]$ at monic $f\in R[x]$
Jan 29, 2017
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10
Is it true that a flat module is torsion-free over an arbitrary ring? Does the reverse implication hold for finitely generated modules?
10
When is the tensor product commutative?
8
What can we say about the dual of an $R$-module homomorphism?
6
Under what conditions does a quotient module $A/B\cong C$ imply the direct sum $A\cong B\oplus C$?
6
Is it true that $(R\times S)[G]\cong R[G]\times S[G]$?