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On the autonomous metric on the group of area-preserving diffeomorphisms of the 2–disc
On the autonomous metric on the group of area-preserving diffeomorphisms of the 2-disc MICHAEL BRANDENBURSKY JAREK K ĘDRA Let D 2 be the open unit disc in the Euclidean plane and let G WD Diff.D 2 ; area/ be the group of smooth compactly supported area-preserving diffeomorphisms of D 2 …