# tohecz

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bio website kmlinux.fjfi.cvut.cz/… location Prague, Czech Republic age 27 member for 2 years, 2 months seen 18 hours ago profile views 133

Math PhD student at Czech Technical University in Prague and at LIAFA in Paris. At the same time, I'm a typesetter (and partly the copy editor) of one scientific journal (done in LaTeX, of course).

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# 69 Posts

 Oct23 asked Is this enough to prove a homeomorphism? — inverse on a dense subset Sep19 answered If A is a matrix, what does A' mean? Aug22 answered Make $n$ cents with $1$-cent, $2$-cent, and $3$-cent coins Aug1 answered Produce unique number given two integers Jun3 answered What is a Parabolic Fixed Point? Jun3 answered Prove $\sqrt6$ is irrational Mar31 answered How do I integrate $\frac{1}{x^6+1}$ Mar2 answered How do I setup the lagrangian for this problem? Feb26 asked Set of all $a\in\mathbb Z$ that are coprime to $b\in\mathbb Z$ Feb6 answered Is any norm induced by some inner product? Jan13 answered Solve $12x\equiv9\pmod{15}$ Jan13 answered Integration $1/x$ - complex number Jan13 answered How is this not a metric? Dec10 answered $1/i=i$. I must be wrong but why? Nov22 answered Cool simple solution to: $-A^2$ is not the identity matrix Nov18 answered Show that $x \mapsto \frac{f(x)}{x}$ is strictly increasing on (0,1) given that f '(x) is strictly increasing on (0,1) and that f(0)=0 Nov18 answered Is it true that $E[X^2]-E[Y^2] = 0?$ Nov18 answered $\lim_{x \to 0} \frac{x^n}{\cos\sin x -\cos x}=l$, find $n$ such that $l$ is non zero finite real Nov18 answered Nesting big-O with big-Omega $O(g(\Omega(h(n))))$: is it $O$ for all $\Omega$ or for one $\Omega$? Nov18 answered Notation for translating vectors