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user371231

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 2 years, 7 months
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Top posts (82) All Questions Answers | Votes Newest

12 Proof of a theorem on simultaneous diagonalization from Hoffman and Kunze. Mar 13 '17
6 $A$ nilpotent and $A+c_iB$ is nilpotent then $B$ is nilpotent. Jan 7
5 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 '17
5 How can I show that $v_i\otimes v_j$ is non zero in $V \otimes_\mathbb {F}V$ Jan 26 '17
5 $(x^a-y^b)$ is a prime ideal in $R[x,y]$ where $R$ is a domain and $\gcd(a,b)=1$. [duplicate] Jan 25 '18
4 Smiths normal form is similar to $xI-A.$ Jun 2 '18
4 Does there exist a $1-1$ ring homomorphism from $M_d(\mathbb{F})$ to $M_n(\mathbb{F})$ for $d <n$? Dec 29 '18
3 $M_n(F)$ contains an isomorphic copy of every extension of $F$ of degree $d \leq n.$ Dec 29 '18
3 Is $\hat{G}$ is complete with respect to the induced topology of $G$? Nov 20 '18
3 Is the power series ring over a polynomial ring the same as the polynomial ring over the power series ring? Nov 8 '18
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