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Zhaohui Du's user avatar
Zhaohui Du's user avatar
Zhaohui Du's user avatar
Zhaohui Du
  • Member for 2 years, 1 month
  • Last seen more than 1 year ago
  • Shanghai
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191
reputation
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5
answers
1
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About

A SW Engineer and mathematics Fan

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Top tags
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Posts
100
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6
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5
Posts
83
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6
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4
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67
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1
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1
Posts
17
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Top posts
answer
3
General orchard planting problem for circles
Dec 11, 2022
question
2
Orchard planting problem of 5 points per circle [closed]
Jan 26, 2023
answer
1
General orchard planting problem for circles
Nov 15, 2022
answer
1
Plant 9 trees in 10 rows of 3
Nov 16, 2022
answer
1
General orchard planting problem for circles
Nov 22, 2022
answer
1
Orchard planting problem of 5 points per circle
Jan 27, 2023
Top network posts
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11
Identity theorem for $f(z)=f(z^2)$
10
show this sequence always is rational number
9
Let $x^3+\frac{1}{x^3}$ and $x^4+\frac{1}{x^4}$ are rational numbers. Show that $x+\frac{1}{x}$ is rational.
8
Probability that the sum of $n$ unit vectors (2D dimention) has length less than one
5
Does the functional equation $f(x)-f\left(x-\frac{x^2}3\right)=\frac{x}{3-x}-\log\left(\frac3{3-x}\right)$ define an analytic function?