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math.AG1998
Surgery, quantum cohomology and birational geometry
Yongbin Ruan
This is an expository article about the recent results on the relation between the naturality problem of quantum cohomology and birational geometry. We give a short survey on Li-Ru…
math.AG1998
Symplectic surgery and Gromov-Witten invariants of Calabi-Yau 3-folds I
An-Min Li, Yongbin Ruan
We define relative Gromov-Witten invariants and establish a general gluing theory of pseudo-holomorphic curves for symplectic cutting and contact surgery. Then, we use our general…