A remark on Getzler's semi-classical approximation
arXiv:1110.5585 · doi:10.4171/119-1/18
Abstract
Ezra Getzler notes in the proof of the main theorem of "The semi-classical approximation for modular operads" that "A proof of the theorem could no doubt be given using [a combinatorial interpretation in terms of a sum over necklaces]; however, we prefer to derive it directly from Theorem 2.2". In this note we give such a direct combinatorial proof using wreath product symmetric functions.
7 pages