The A-infinity operad and the moduli space of curves

Details The A-infinity operad and the moduli space of curves The A-infinity operad and the moduli space of curves

2004-02-02

arxiv.org/abs/math/0402015v2

Mathematics

Algebraic Geometry

14 pages. Version 2: references added, proofs cleaned up

Scientific paper

The modular envelope of a cyclic operad is the smallest modular operad containing it. A modular operad is constructed from moduli spaces of Riemann surfaces with boundary; this modular operad is shown to be the modular envelope of the A-infinity cyclic operad. This gives a new proof of the result of Harer-Mumford-Thurston-Penner-Kontsevich that a cell complex built from ribbon graphs is homotopy equivalent to the moduli space of curves.

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