PEN
Revision as of 16:24, 28 September 2007 by Valentin Vornicu (talk | contribs)
PEN is an acronym for Problems in Elementary Number Theory.
Originally created by Hojoo Lee, it is now hosted on <url>index.php?f=456 AoPS-MathLinks</url>, and co-managed by <url>usercp.php?u=2639&mode=viewprofile Peter</url>.
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