Top network posts

• 18 Does a four-variable analog of the Hall-Witt identity exist?
• 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 $\sum_{i=1}^{n-1}[x_{i+1}-x_{i}]$
• 7 How do I evaluate $\prod_{r=1}^{\infty }\left (1-\frac{1}{\sqrt {r+1}}\right)$?
• 7 Prove or disprove $2abc(a+b+c)\ge 3(a^2b^2c^2+1)$
• 6 More classes of rings spanned by units?
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