BOUNDED STEP FUNCTIONS AND FACTORIAL RATIO SEQUENCES
Jason P. Bell, Jonathan Bober · International Journal of Number Theory · 2009
We study certain step functions whose nonnegativity is related to the integrality of sequences of ratios of factorial products. In particular, we obtain a lower bound for the mean square of such step functions which allows us to give a restriction on when such a factorial ratio sequence can be integral. Additionally, we note that this work has applications to the classification of cyclic quotient singularities.