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hengxin

I am interested in distributed computing and formal methods.

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26 Why is the “topologist's sine curve” not locally connected? Feb 7 '14
17 Projection map being a closed map Feb 12 '14
14 What are the components and path components of $\mathbb{R}^{\omega}$ in the product, uniform, and box topologies? Feb 9 '14
11 What is the one-point compactification of $\mathbb{Z}_{+}$? Feb 27 '14
9 What does the isomorphism $G / Z(G) \cong \text{Inn}(G)$ mean? Mar 19 '14
9 Sum of two gamma/Erlang random variables $\Gamma(m,\lambda)$ and $\Gamma(n, \mu)$ with integer numbers $m \neq n, \lambda \neq \mu$ May 21 '14
8 Does $\sum_{k=0}^{k=n} {n \choose k} k!$ have a closed form for integers $k,n$? May 24 '14
8 What is the intuition behind homeomorphism, especially behind the geometrical notion of “gluing together”? Sep 21 '14
6 What is $\frac{x^{10} + x^8 + x^2 + 1}{x^{10} + x^6 + x^4 + 1}$ given $x^2 + x - 1 = 0$? Nov 23 '15
6 How to prove that $[G:xHx^{-1}] = [G:H]$ given $H \le G$? Mar 5 '14
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