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Jan 17, 2021 at 16:40 vote accept Denis T
Jan 12, 2021 at 19:03 comment added Zippy For your second question, the proof of Proposition 5.4 of this paper constructs Stein structures on a smooth 4-manifold that admits a smooth embedding in $R^4$, for which the canonical class is nonzero. Such examples can't be holomorphically embedded in $C^2$.
Jan 12, 2021 at 18:47 review First posts
Jan 12, 2021 at 19:39
Jan 12, 2021 at 18:42 history answered Zippy CC BY-SA 4.0