Terrestrial spiders transfer methyl mercury (MeHg) to terrestrial consumers such as birds, but how spiders become contaminated with MeHg is not well understood. In the present study, the authors usedâ€¦ (More)

Let k be a positive integer, and suppose that the number of elements of a group G that are not k th powers in G is nonzero but finite. If G is finite, we obtain an upper bound on |G|, and we presentâ€¦ (More)

Acta crystallographica. Section A, Foundations ofâ€¦

2013

The use of PÃ³lya's theorem in crystallography and other applications has greatly simplified many counting and coloring problems. Given a group of equivalences acting on a set, PÃ³lya's theorem equatesâ€¦ (More)