McMahon's Formula via Free Fermions
arXiv:1210.7109
Abstract
We give an elementary derivation of the vertex-operator derivation McMahon formula, counting all plane partitions of all size into a single generating function. We fill in some details appearing in Okounkov, Reshetikhin, and Vafa based on free fermions by defining an "interlacing operator".
6 pages, 1 figure