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I recently stumbled on preprint "36 unsolved problems in number theory", ArXiv:math/0010143.

and I was wondering what does 'Gamma $\underline{\phantom{abcbdbe}}$' refer to? (I'm interested in some of the questions but I'm not sure what should I do to look up further regarding some of these questions esp. those without references.

Thanks :)

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    Perhaps a [Romania (Brasov) 'journal'](http://www.scribd.com/doc/7832401/28/JUBILEE-OF-%E2%80%9CGAMMA%E2%80%9D-JOURNAL)2012-08-31

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