We look at the following chain of symplectic embedding problems in
dimension four. \[E(1, a) \to Z_4(A),\ E(1, a) \to C_4(A),\ E(1, a)
\to P(A, ba) (b \in {\mathbb N}_{\geq 2}),\ E(1, a) \to T_4(A).\]
Here $E(1, a)$ is a symplectic ellipsoid, $Z_4(A...
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