Mathematics
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chizhek
  • Member for 7 years, 10 months
  • Last seen more than 3 years ago
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A retired mathematician, but still active (more than ever).
About the name and the icon: "chizhek" is Slovenian for "siskin".

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3
The upper limit on the size of an answer
May 30, 2016
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20
Does a four-variable analog of the Hall-Witt identity exist?
9
Prove or disprove $2abc(a+b+c)\ge 3(a^2b^2c^2+1)$
8
Chinese Remainder theorem with non-pairwise coprime moduli proof
8
Nonzero subdeterminants conjecture: has anybody seen this anywhere?
7
How find this maximum and minimum of the value $\sum_{i=1}^{n-1}[x_{i+1}-x_{i}]$

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