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Symplectomorphism groups and embeddings of balls into rational ruled 4-manifolds
Abstract Let M μ 0 denote S 2 × S 2 endowed with a split symplectic form $\mu \sigma \oplus \sigma $ normalized so that μ ≥1 and σ ( S 2 )=1. Given a symplectic embedding $\iota :B_{c}\hookrightarrow M^0_{\mu }$ of the standard ball of capacity c ∈(0,1) into …