Seminar by Marithania Silvero Casanova + dinner

[ZUDDAS DANIELE]

Dear all,

on 9 April at 15:45 there will be a talk by Marithania Silvero Casanova at our Department. On the same day we will have social dinner. Interested people are welcome to participate and if you want to join also the dinner please let me know in advance so I can make a reservation.

Venue: Seminar room, third floor of H2bis, MIGe, UniTS, Via Valerio 12/1.

Title: Diagnosing positivity in links. Any Doctor in the room?

Abstract: When studying knots (or, more generally, links), it is common to classify them into families according to certain properties. A common approach is to declare that a knot belongs to a given family if it admits a diagram satisfying a specific condition. This is the case for the various notions of positivity for links (positive links, braid-positive links, quasipositive links, etc.). The definitions of these families (that is, the requirements imposed on their diagrams) are motivated by the contexts in which they arise. Moreover, several invariants exhibit special properties when restricted to these families.
In this talk, we will explore the main notions of positivity for knots and links and discuss the relationships between them. We will also highlight some key properties that are reflected in several well-known link invariants. The talk will be mostly self-contained, and several examples will be shown to illustrate the definitions and results.

All the best,
Daniele