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Atsina

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

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  • Member for 2 years
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  • Last seen Apr 17 at 4:07

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Top Posts (80) All Questions Answers | Votes Newest

10 $\lambda$ is an eigenvalue of $A$ if and only if $\lambda^2$ is an eigenvalue of $A^2$ Jan 1 '18
8 How to prove that there is no differentiable function with given partial derivatives Aug 25 '18
4 If $A$ is invertible and $A^n$ is diagonalizable, then $A$ is diagonalizable. Dec 5 '18
4 Proving a Binomial Summation with Induction $\sum_{k=0}^n(-1)^k \binom nk^2$ [duplicate] Mar 29 '17
4 On the irreducibility of a polynomial that almost satisfies Eisenstein's Criterion Apr 28 '18
3 Let $M$ be the set of all $2\times2$ real matrices, and define $f:M\rightarrow M$ by $f(A)=A^3$. Is $f$ surjective? Jan 8 '18
3 Does there exist a function $f:\mathbb{R}→\mathbb{R}$ such that $f(x+y)=f(x)+f(y)$ for all $x,y\in\mathbb{R}$; $f(1)=1$; and $f(\sqrt2)=3$? Sep 14 '17
3 If dim($W$), $|S|$ are equal and finite, then the elements of $S$ are not linearly independent. Jan 5 '18
3 If $Ax \in \langle x \rangle=\{ax:a\in \mathbb{R}\}$ for every vector $x$, then $A$ is square and diagonal. Jan 5 '18
3 Suppose that $A_{m\times n}x=0$ has a nontrivial solution $x$. Prove that, for some row vector $z$, the equation $yA=z$ has no solution. Jan 2 '18
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