A quantum Leray-Hirsch theorem for banded gerbes
Abstract
For a gerbe over a smooth proper Deligne-Mumford stack banded by a finite group G, we prove a structure result on the Gromov-Witten theory of , expressing Gromov-Witten invariants of in terms of Gromov-Witten invariants of twisted by various flat U(1)-gerbes on . This is interpreted as a Leray-Hirsch type of result for Gromov-Witten theory of gerbes.
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