Hagen von Eitzen
Reputation
137,695
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# 137,695 Reputation

105 today
 +25 1 hour ago 2 events Showing a certain cyclotomic polynomial must split +25 3 hours ago 2 events Finding roots in finite fields. +25 6 hours ago 2 events Have you seen these integer factorization algorithms before? +10 7 hours ago upvote Find the values of $f(0)$, $f(4)$, $f(6)$ and $f(18)$ +10 7 hours ago upvote Probability to get from point A to point B. +10 7 hours ago upvote Is an empty parenthesis a valid mathematical expression?
200 yesterday
 +40 19:00 4 events Number of functions for $(f(x))^2=x^2$ +35 20:34 3 events How calculate: $\lim \limits_{(x,y) \to (0,0)} \frac{ln(1+2x^2+4y^2)}{arctan(x^2+2y^2)}$? +10 23:27 2 events Probability to get from point A to point B. +10 22:19 upvote Differentiate polynomials in $\mathbb{Z}_2[x]$ +10 22:18 upvote Does A5 have a subgroup of order 6? +10 22:09 upvote Let $I = \{a +\sqrt2b \in \Bbb Z[\sqrt2] : a$ and $b$ are both multiple of $5\}$. +10 21:40 upvote Have you seen these integer factorization algorithms before? +10 21:03 upvote Statement similar to Fermat's last theorm and Beal's conjecture: $A^x+A^y=A^z$ +10 19:30 upvote Collatz sequences meet at a point +10 18:12 upvote Expressing a set in tabular method +10 17:54 upvote Last digits of sum $n!+m!$ +10 16:31 upvote A real $2 \times 2$ matrix $M$ such that $M^2 = \tiny \begin{pmatrix} -1&0 \\ 0&-1-\epsilon \\ \end{pmatrix}$ , then : +10 13:08 upvote Let $f\colon [a,b]\to\mathbb R$ is continuous and $G(x,t)=t(x-1)$ when $t\leq x$ and $x(t-1)$ when $t\geq x$. +10 11:41 upvote Proof of linear independence of non-empty subsets +10 11:28 upvote $1, e^{ix}, e^{-ix}$ are linearly independent +10 09:20 upvote Why is empty set an open set? 22:48 upvote Showing a certain cyclotomic polynomial must split -15 01:09 unaccept Deducing that the inverse of a permutation matrix is its transpose
260 2 days ago
 +55 13:45 5 events Deducing that the inverse of a permutation matrix is its transpose +40 18:27 4 events Cover a cicular hole with planks +35 12:10 3 events Is it possible to replace $\lim$ by $\sup$ here? +25 17:04 2 events For a field $K$ is $K\subset{K[X_{1},…X_{n}]}$ +20 19:54 2 events Prove that $F=\left(-x^2+2\right)\cdot \cos\left(x\right)+2x\sin\left(x\right)$ don't have limit +20 11:51 2 events Purely number theory problems +20 07:55 2 events Power Series Problem… +15 20:34 3 events Power to which 7 is raised to produce a number starting with 2015… +10 19:17 upvote can I draw a 2nd degree 2 dimensional surface trough 3x3 points, like I can draw a 2nd degree polynomial through any 3 points +10 13:20 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 +10 11:45 upvote Image of archimedean place of a number field in $\mathbb C$ 20:44 upvote Suppose $A$ is a subset of $B$ and $B$ is a subset of $C$ and $A$ is equinumerous with $C$. Prove $B$ is equinumerous with $C$. 20:27 upvote question regarding group permutation computation 20:04 upvote Chance that first 6 characters of a SHA-1 hash matching another SHA-1 hash? 20:00 upvote Finite abelian group - product of its elements
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