1998/11/30 by Ivan K. Babenko, Iskander A. Taimanov
Mathematics · #math.SG
published as Siberian Math. J. 41 (2000), 204-217. · 20 pages, LaTeX; the short announcement see in math.SG/9810065; a revised version
arxiv created 1998/12/17 · arxiv updated 2009/11/30
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.