76 citations · 308 across the 22 of their papers we have counts for
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math.SG2007★ 76 cited
Spectral numbers in Floer theories
Michael Usher
The chain complexes underlying Floer homology theories typically carry a real-valued filtration, allowing one to associate to each Floer homology class a spectral number defined as…
math.SG2007★ 21 cited
Kodaira dimension and symplectic sums
Michael Usher
Modulo trivial exceptions, we show that smoothly nontrivial symplectic sums of symplectic 4-manifolds along surfaces of positive genus are never rational or ruled, and we enumerate…