|Time||Jan 9 16:20~16:40|
|Title||Four-manifolds admitting hyperelliptic broken Lefschetz fibrations|
Broken Lefschetz fibrations were introduced recently as a generalization of Lefschetz fibrations to near-symplectic setting. In this talk, we will introduce hyperelliptic simplified broken Lefschetz fibrations and show that the total space of such a fibration admits an involution induced naturally by the hyperelliptic involution on fibers. We will also give a signature formula of this kind of fibrations. The results in this talk are joint work with Masatoshi Sato.