Hagen von Eitzen
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# 196,959 Reputation

230 yesterday
 +140 23:31 upvote How can I answer this Putnam question more rigorously? +15 21:30 accept How can I answer this Putnam question more rigorously? +10 21:03 upvote Why can the sieve of eratosthenes not be used to confirm the twin primes conjecture? +15 19:49 accept How I can find planar graph for which greedy vertex coloring find coloring with 7 colors? +30 19:49 upvote How I can find planar graph for which greedy vertex coloring find coloring with 7 colors? +20 15:48 upvote Find all functions that satisfy $f(\frac{x+4}{1-x}) + f(x) = x$
60 2 days ago
 +30 21:59 upvote Find all functions that satisfy $f(\frac{x+4}{1-x}) + f(x) = x$ +10 14:07 upvote Find the real and imaginary parts of an equation +10 05:59 upvote Is $g$ an injective continuous mapping? +10 02:05 upvote $f(x+1)-f(x)=2x+3$ How do I solve $f(x)$?
160 Jul 26
 +10 22:53 upvote “such that” logical symbol +10 21:17 upvote About the special linear group $SL(n,\,\mathbb{Z})$ +15 19:50 accept Primes and squares +10 16:44 upvote Primes and squares +20 14:50 upvote Is $g$ an injective continuous mapping? +50 14:19 upvote $f(x+1)-f(x)=2x+3$ How do I solve $f(x)$? +10 09:30 upvote Expected value of number of “good” triples in the set of vectors +15 08:17 accept $A$ is a complex nilpotent $15X15$ matrix of order 5 ($A^5=0$), $\operatorname{rank}(A)=10$, $\operatorname{rank}(A^3)=4$. Find all possible JCFs +10 08:17 upvote $A$ is a complex nilpotent $15X15$ matrix of order 5 ($A^5=0$), $\operatorname{rank}(A)=10$, $\operatorname{rank}(A^3)=4$. Find all possible JCFs +10 01:20 upvote Why is $\varphi$ called “the most irrational number”?
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