Hagen von Eitzen
Reputation
137,320
380/400 score
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Impact
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# 137,320 Reputation

190 today
 +30 1 hour ago upvote Cover a cicular hole with planks +10 2 hours ago upvote For a field $K$ is $K\subset{K[X_{1},…X_{n}]}$ +40 2 hours ago upvote Proof verification: Deducing that the inverse of a permutation matrix, is its transpose +15 3 hours ago accept Proof verification: Deducing that the inverse of a permutation matrix, is its transpose +10 3 hours ago upvote Prove that X=Y is equivalent to P(X)=P(Y),where X,Y are sets and P(X) is Set of X's all subsets.The same goes for P(Y0 +15 4 hours ago accept Is it possible to replace $\lim$ by $\sup$ here? +20 4 hours ago upvote Is it possible to replace $\lim$ by $\sup$ here? +20 4 hours ago upvote Purely number theory problems +10 4 hours ago upvote Image of archimedean place of a number field in $\mathbb C$ +20 8 hours ago upvote Power Series Problem…
245 yesterday
 +15 23:28 accept Show that given a partial order there exists a total order +162 14:56 upvote Is an empty parenthesis a valid mathematical expression? +10 10:39 upvote there doesn't exist any sequence of polynomials which converge to $\sin x$ uniformly on $\mathbb{R}$ +15 09:47 accept Are the connected components of the level sets of a $\mathcal{C}^1$ function path-connected? -2 08:46 downvote Is an empty parenthesis a valid mathematical expression? +10 08:37 upvote How can a piece of A4 paper be folded in exactly three equal parts? +10 06:35 upvote Largest eigenvalues of AA' equals to A'A +10 03:40 upvote $f(x^2 + 1) = f(x)g(x)$ $\forall$ x $\in\mathbb{R}$ $\Rightarrow$ no. of roots of $f(x)=$? +15 00:12 accept Let $f:[0,\infty]\to R$ be differentiable on $(0, \infty)$, and $f'(x)\to b$ as $x \to \infty$. Show that $\lim_{x \to \infty}\frac{f(x)}{x}=b$
210 2 days ago
 +15 20:33 accept Follow-on question to “Fifty men and thirty woman…” +10 18:09 upvote Continuous boundary of a convex set +10 18:02 upvote Question about the proof that $K(u)$ is isomorphic to $K(x)$ if u is transcendental over $K$. +20 17:28 upvote shown that f is even +15 17:03 accept Word problem help? +10 16:08 upvote Show that the area of a triangle is given by this determinant +10 16:07 upvote question on the proof of uniqueness of completion +10 15:59 upvote Solutions for the following equation. +20 15:28 upvote Proving $a + a = a$ if a statement is true +10 15:26 upvote Use of brackets around the integrand +20 14:55 upvote Roots of “almost cyclotomic” polynomials +15 14:55 accept Roots of “almost cyclotomic” polynomials +20 14:25 upvote Prove that $r$ is irreducible if and only if every divisor of $r$ is either a unit or an associate of $r$. -15 11:16 unaccept Two pawns walking in a complete graph +10 06:56 upvote Are the connected components of the level sets of a $\mathcal{C}^1$ function path-connected? +15 06:12 accept Is $f(x)$ reducible if $f(a)=0$ +20 06:12 upvote Is $f(x)$ reducible if $f(a)=0$ -15 05:18 unaccept Follow-on question to “Fifty men and thirty woman…” +10 02:30 upvote Does A5 have a subgroup of order 6?
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