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math.SG2021
Symplectic maps and hyperKähler moment map geometry
Yann Rollin
We obtain a correspondence between the group of symplectic diffeomorphisms of a 4-dimensional real torus and the vanishing locus of a certain hyperKähler moment map. This observati…
math.SG2020
Polyhedral approximation by Lagrangian and isotropic tori
Yann Rollin
We prove that every smoothly immersed 2-torus of can be approximated, in the C0-sense, by immersed polyhedral Lagrangian tori. In the case of a smoothly immersed (re…