Time: 09h30, Thursday, April 28th, 2022.

Venue: Room 303, A5, Institute of Mathematics, VAST

Abstract: This work generalizes a classical result from Picard-Lefschetz theory about monodromies of a isolated plane curve singularities, by proving that the monodromies on links of normal complex surface singularities admit positive factorizations, that is, they can be expressed as the product of right handed Dehn twists. An important result by Anne Pichon which characterizes topologically these monodromies, gives a connection between all this result and the theory of mapping class groups.