KOALA 2024:  Workshop of the Kentucky-Ohio ALgebra Alliance

May 21-22, 2024
Math Department
University of Kentucky

Organizers:
Dave Jensen
Chris Manon

This event is funded by the National Science Foundation
under
DMS-2054135 and DMS-2101911.
KOALA Poster


Registration:
All participants, including invited speakers, are asked to register online.  The deadline for registration is April 30.  Please fill out the following registration form.

Discord Server:
The KOALA discord can be found here:  https://discord.gg/WKw9fNhP

About KOALA:

The Mathematics Departments at both The Ohio State University (Columbus, OH) and the University of Kentucky (Lexington, KY) have a critical mass of faculty, postdocs and graduate students in Combinatorial Algebraic Geometry. Faculty at both institutions often have research collaborations and meet each other at conferences. Younger members of both groups do not have as many opportunities to interact.

KOALA workshops (regular 2-day meetings held once a year, and alternating between both institutions) provide a venue to further expand collaborations between these two groups. Their main goals are:



Speakers:

Austin Alderete

Madeline Brandt
Austin Alderete

Madeline Brandt



Juliette Bruce
                            
Chris Eur
Juliette Bruce

Chris Eur



Schedule:


Time
Location
Speaker/Event
Title
Tuesday


1:00 - 1:50 PM
CP 103
Chris Eur

2:00 - 3:00 PM
CP 111
Coffee Break

3:00 - 3:50 PM
CP 103
Juliette Bruce
The top-weight cohomology of A_g
4:00 - 4:30 PM
CP 111
Coffee Break

4:30 - 5:30 PM
CP 103
Lightning Session

6:00 - 8:00 PM
Math House (654 Maxwelton Ct)
Dinner

8:00 PM - ???
Kentucky Native Cafe
Drinks





Wednesday



8:30 - 9:30 AM
CP 111
Breakfast

9:30 - 10:20 AM
CP 103
Austin Alderete

10:30 - 11:00 AM
CP 111
Coffee Break

11:00 - 11:50 AM
CP 103
Madeline Brandt
Topology of (Tropical) Moduli Spaces:  Hyperelliptic Curves
12:00 PM - ???
Wherever you like
Lunch




Titles and Abstracts:

Madeline Brandt:  Topology of (Tropical) Moduli Spaces: Hyperelliptic Curves

Moduli spaces offer a geometric solution to geometric classification problems by parameterizing all objects of some type. Tropical versions of these spaces explain the combinatorics of their compactifications.     Moreover, these tropical moduli spaces can be used to compute a piece of the cohomology of the corresponding classical moduli space. In joint work with Melody Chan and Siddarth Kannan, we study the topology of the moduli space of hyperelliptic curves using these techniques.

Juliette Bruce:  The top-weight cohomology of A_g

I will discuss recent work calculating the top weight cohomology of the moduli space A_g of principally polarized abelian varieties of dimension g for small values of g. The key idea is that this piece of cohomology is encoded combinatorially via the relationship between the boundary complex of a compactification of A_g and the moduli space of tropical abelian varieties. This is joint work with Madeline Brandt, Melody Chan, Margarida Melo, Gwyneth Moreland, and Corey Wolfe.