Abstract
Let M be a closed oriented smooth 4-manifold admitting symplectic structures. If M is minimal and has b+ = 1, we prove that there is a unique symplectic canonical class up to sign, and any real second cohomology class of positive square is represented by symplectic forms. Similar results hold when M is not minimal.
Citation
Tian-Jun Li. Ai-Ko Liu. "Uniqueness of Symplectic Canonical Class, Surface Cone and Symplectic Cone of 4-Manifolds with B+ = 1." J. Differential Geom. 58 (2) 331 - 370, June, 2001. https://doi.org/10.4310/jdg/1090348329
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