On nonformal simply connected symplectic manifolds
Ivan K. Babenko, Iskander A. Taimanov
math.SGarXiv:math/9811167
Abstract
For any N ≥ 5 nonformal simply connected symplectic manifolds of dimension 2N are constructed. This disproves the formality conjecture for simply connected symplectic manifolds which was introduced by Lupton and Oprea.
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