Mathematics
Chao Xu's user avatar
Chao Xu's user avatar
Chao Xu's user avatar
Chao Xu
  • Member for 12 years, 8 months
  • Last seen this week
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About

Assistant Professor at UESTC.

I'm interested in algorithms, combinatorial optimization, computational geometry and problem solving in general.

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All Questions Answers
Score Newest
answer
106
Why is "the set of all sets" a paradox, in layman's terms?
Jul 20, 2010
question
90
Why isn't reflexivity redundant in the definition of equivalence relation?
Jul 22, 2010
question
51
What is the shortest string that contains all permutations of an alphabet?
Dec 25, 2010
question
28
Find taxicab numbers in $O(n)$ time
Aug 19, 2010
question
27
Balance chemical equations without trial and error?
Jul 24, 2010
answer
26
What mathematical questions or areas have philosophical implications outside of mathematics?
May 30, 2011
question
19
Fields that require both CS and pure math
Aug 7, 2010
question
17
Construct a bijection from $\mathbb{R}$ to $\mathbb{R}\setminus S$, where $S$ is countable
Jul 22, 2010
answer
14
Why is $x^0 = 1$ except when $x = 0$?
Jul 20, 2010
question
12
$\{1,1\}=\{1\}$, origin of this convention
Jun 8, 2012
Top Meta posts
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2
12
General Policy of Environment: More MathOverflow-like, or StackOverflow-like?
4
Calling all Physics, Mathematical Bio, Engineering, Econ, Contest Math, etc. Enthusiasts...
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45
How to use the computer modern font in webpages?
40
Sorting algorithm, such that each element is compared $O(\log n)$ times, and doesn't depend on a sorting network
37
Is it NP-hard to fill up bins with minimum moves?
28
Subset sum problem with many divisibility conditions
23
Collectively pay the bill problem

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