`2021-09-16 15:00:00``2021-09-16 16:00:00``Positivity and symplectic embeddings``Title: Positivity and symplectic embeddings Speaker: Ben Wormleighton (Washington University in St. Louis) Speaker's URL https://sites.google.com/view/benw/ Abstract: Connections between positivity of divisors in algebraic geometry and embedding problems in symplectic geometry have a 30 year history, bringing together significant aspects of each field (e.g. Nagata conjecture, toric degenerations, ball packings,…). I will describe positivity invariants for weakly polarised surfaces that capture valuable and, in some cases, complete information about symplectic embeddings into them. I will discuss how this theory interacts with Zariski decomposition and volume of divisors, and outline the current state of the higher dimensional picture.``Zoom``OSU ASC Drupal 8``ascwebservices@osu.edu``America/New_York``public`

`2021-09-16 15:00:00``2021-09-16 16:00:00``Positivity and symplectic embeddings``Title: Positivity and symplectic embeddings Speaker: Ben Wormleighton (Washington University in St. Louis) Speaker's URL https://sites.google.com/view/benw/ Abstract: Connections between positivity of divisors in algebraic geometry and embedding problems in symplectic geometry have a 30 year history, bringing together significant aspects of each field (e.g. Nagata conjecture, toric degenerations, ball packings,…). I will describe positivity invariants for weakly polarised surfaces that capture valuable and, in some cases, complete information about symplectic embeddings into them. I will discuss how this theory interacts with Zariski decomposition and volume of divisors, and outline the current state of the higher dimensional picture.``Zoom``Department of Mathematics``math@osu.edu``America/New_York``public`**Title: **Positivity and symplectic embeddings

**Speaker: **Ben Wormleighton (Washington University in St. Louis)

**Speaker's URL **https://sites.google.com/view/benw/

**Abstract: **Connections between positivity of divisors in algebraic geometry and embedding problems in symplectic geometry have a 30 year history, bringing together significant aspects of each field (e.g. Nagata conjecture, toric degenerations, ball packings,…). I will describe positivity invariants for weakly polarised surfaces that capture valuable and, in some cases, complete information about symplectic embeddings into them. I will discuss how this theory interacts with Zariski decomposition and volume of divisors, and outline the current state of the higher dimensional picture.