Formality is a topological property, defined in terms of Sullivanâ€™s model for a space. In the simply-connected setting, a space is formal if its rational homotopy type is determined by the rational cohomology ring.

In 1975, Deligne, Griffiths, Morgan and Sullivan proved that any compact Kaehler manifold is formal. We study the analogue for some contact manifolds. Such spaces are obtained as the total space of some circle and sphere bundles over symplectic manifolds. These include some Sasakian manifolds.

- All seminars.
- Seminars for 2018

Last updated: 19 Feb 2019