%0 Journal Article %A Zhi-Hong Sun %T The expansion of $\prod_{k=1}^{\infty }(1-q^{ak})(1-q^{bk})$ %J Acta Arithmetica %D 2008 %P 11-29 %V 134 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa134-1-2/ %R 10.4064/aa134-1-2 %G en %F 10_4064_aa134_1_2