Ewan Delanoy
Reputation
98/100 score
 2d asked Optimizing value of discrete harmonic function at a given point Apr 24 answered Prove that for any $A \neq 0$ there is a matrix $B$ such that $A + B$ and $B$ have no eigenvalues in common. Apr 19 answered Given $U,v,w$ find $u \in U$ that value of $||u-w|| + || v - u||$ will be minimal Apr 18 answered Estimate the bound of the sum of the roots of $1/x+\ln x=a$ where $a>1$ Apr 17 answered When is it OK to assume something like $a \ge b \ge c$ when proving inequalities? Apr 14 answered linear algebra (matrices) - challenging problem (determination of method/algorithm) Apr 13 asked Denominator is product of irreducibles with cyclic Galois group Apr 13 answered Show that $\Bbb Q(\sqrt[p]{a}, \omega )=\Bbb Q(\sqrt[p]{a}+ \omega )$ Apr 7 answered Prove that a periodic nested radical converges to the largest real root of the corresponding polynomial Apr 7 asked Probabilities for two bombs and a businessman Mar 27 answered If $\min(\alpha,F)$ has only one root in $E$, must $\min(p(\alpha),F)$ have only one root in $E$ Mar 26 answered How to prove that: if $q= b+d$, then $p = a+c$? Mar 20 asked Do those iterated increment rates always yield monotonic functions? Mar 20 asked Upper bound on finite increment rate for log Mar 16 answered How to solve the following linearly independent vector problem? Mar 13 answered if $f(x + y) = f(x)f(y)$ is continuous, then it has to be injective. Mar 8 answered If $x>0$ is such that $x^{n}+\frac{1}{x^n}$ and $x^{n+1}+\frac{1}{x^{n+1}}\in \mathbb{Q} \implies x+\frac{1}{x}\in\mathbb{Q}$? Mar 6 asked Construct $2$-paradoxical tournaments of order $n$ for $n\geq 21$ Feb 22 answered Can transposition $GL_n(k)\to GL_n(k)$ ever be realized as conjugation by some element in $S_n$? Feb 21 answered Maximize $x^2+y^2+z^2$ subject to $x+2y+3z=4$ and $x,y,z\geq 0$