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.
Original language | English (US) |
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Pages (from-to) | 331-370 |
Number of pages | 40 |
Journal | Journal of Differential Geometry |
Volume | 58 |
Issue number | 2 |
DOIs | |
State | Published - 2001 |