Uniqueness of symplectic canonical class, surface cone and symplectic cone of 4-manifolds with B+ = 1

Tian Jun Li, Ai Ko Liu

Research output: Contribution to journalArticle

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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 languageEnglish (US)
Pages (from-to)331-370
Number of pages40
JournalJournal of Differential Geometry
Issue number2
StatePublished - Jan 1 2001


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