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References to 'square root of 2'
1. Gelfond-Schneider constant by PrimeFan
2. Pell number by CompositeFan
3. proof that $\sqrt{2}$ is irrational by Wkbj79
4. reductio ad absurdum by gribskoff
5. silver ratio by PrimeFan
6. table of differences between $\lceil \sqrt{n!} \rceil^2$ and $n!$ for $0 < n < 26$ by PrimeFan
7. the top 10 most beautiful theorems by PrimeFan