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Jeroen

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 8 years, 4 months
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  • Last seen Feb 21 at 14:12

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38 Prove that the function$\ f(x)=\sin(x^2)$ is not uniformly continuous on the domain $\mathbb{R}$. Oct 22 '12
11 Let $G$ be a finite group with $|G|>2$. Prove that Aut($G$) contains at least two elements. May 18 '13
10 Show that $h \equiv 1 \pmod p$, where $h$ is the number of subgroups of order $p$ and $p$ divides the group order. [duplicate] May 9 '13
8 Let $G$ be a group of order $pq$, with $p$ and $q$ prime. Prove that the order of the center of $G$ is 1 or $pq$. May 12 '13
6 Calculate $\int_{0}^{2\pi} \frac{\cos((2n+1)t)}{\cos(t)}dt$ May 2 '14
6 For which values of $\alpha \in \mathbb R$ is the following system of linear equations solvable? Nov 4 '12
6 In how many ways can the alphabet be ordered such that no four or five vowels are next to each other? Nov 6 '12
5 Prove that $f$, such that $\forall\delta\gt0$ $|f(y)-f(x)|\lt\delta^2$ $\forall x,y\in\mathbb{R}$ and $|y-x|\lt\delta$, is a constant function. Oct 24 '12
5 Chain rule proof May 18 '13
4 Prove that $L_A(X)=AX-XA$ is symmetric if and only if $A$ is symmetric. Apr 8 '13
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