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Frank Z.K. Li's user avatar
Frank Z.K. Li's user avatar
Frank Z.K. Li's user avatar
Frank Z.K. Li
  • Member for 9 years, 2 months
  • Last seen more than 2 years ago
  • Tianjin, China
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The fourth grade Ph.D. candidate majoring in combinatorics

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How to prove $\prod_{\lambda\vdash n}\prod_im_i(\lambda)!=\prod_{\lambda\vdash n}1^{m_1(\lambda)}2^{m_2(\lambda)}\cdots$
Oct 19, 2015
question
4
How to prove that $\sum_{i=0}^n\frac{(a;q)_i}{(q;q)_i}\frac{(b;q)_{n-i}}{(q;q)_{n-i}}a^{n-i}=\frac{(ab;q)_n}{(q;q)_n}$?
Oct 19, 2015
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1
Inequality about the minimum vertex degree in $k$-uniform hypergraphs
Jun 10, 2017
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Intersection property of Szemerédi's regularity condition
Nov 28, 2016
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The restriction of any Freiman homomorphism of order 2 to $\{kd:-l\leq k \leq l\}$ is linear?
Apr 2, 2017