%0 Journal Article %T On the number of diamonds in the subgroup lattice of a finite abelian group %A Dan Gregorian Fodor %A Marius Tarnauceanu %J Mathematics %D 2013 %I arXiv %X The main goal of the current paper is to determine the total number of diamonds in the subgroup lattice of a finite abelian group. This counting problem is reduced to finite $p$-groups. Explicit formulas are obtained in some particular cases. %U http://arxiv.org/abs/1312.1429v1