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Homological stability properties of spaces of rational $J$–holomorphic curves in $\mathbb{P}^2$

Jeremy Miller

Algebraic & Geometric Topology 13 (2013) 453–478

In a well known work, Graeme Segal proved that the space of holomorphic maps from a Riemann surface to a complex projective space is homology equivalent to the corresponding space of continuous maps through a range of dimensions increasing with degree. In this paper, we address if a similar result holds when other (not necessarily integrable) almost complex structures are put on projective space. We take almost complex structures that are compatible with the underlying symplectic structure. We obtain the following result: the inclusion of the space of based degree–k J–holomorphic maps from 1 to 2 into the double loop space of 2 is a homology surjection for dimensions j 3k 3. The proof involves constructing a gluing map analytically in a way similar to McDuff and Salamon, and Sikorav, and then comparing it to a combinatorial gluing map studied by Cohen, Cohen, Mann, and Milgram.

almost complex structure, little disks operad, gluing
Mathematical Subject Classification 2000
Primary: 53D05
Secondary: 55P48
Received: 10 February 2012
Revised: 15 October 2012
Accepted: 16 October 2012
Published: 6 March 2013
Jeremy Miller
Department of Mathematics
CUNY Graduate Center
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New York, NY 10016