Over the last decade, it's become clearer than ever that bacteria in the human gut-- collectively termed the microbiome--play a key role in health and disease. Now, researchers reporting in PLOS ...

The coupon subset collection problem is a generalization of the classical coupon collecting problem, in that rather than collecting individual coupons we obtain, at each time point, a random subset of ...

We study the problem of determining the minimal degree d(m) of a polynomial that has all coefficients in {0, 1} and a zero of multiplicity m at -1. We show that a greedy solution is optimal precisely ...