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Mr.xue
  • Member for 3 years, 9 months
  • Last seen more than a month ago
  • China
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A fresh graduate student.

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3
How to use comparison principle to prove the following inequality about Laplace equation?
Oct 30, 2022
question
2
How to prove this this integral equality which contain nonlocal operator, $(-\partial_{xx})^{1/2}$?
Jul 11, 2021
question
1
How to check that $f(t,x)\ge 0$ for any $x\ge 0$?
Jun 29, 2021
question
0
An inequality about quasi-linear function
Dec 10, 2021
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11
An inequality about quasi-linear function
6
Let $f$ be a real function and $a<b<c<d$. If $f$ is convex on $[a,c]$ and $[b,d]$, then can we say $f$ is convex on $[a,d]$?
5
What is the degree of polynomial $0$?