# Sam Ballas

I am currently an an assistant professor in the Department of Mathematics at Florida State University.

Previously I was an RTG visiting assistant professor at UC Santa Barbara. Before that I was a graduate student at The University of Texas at Austin under the supervision of Alan Reid.

If you want to learn more about me feel free to check out my short Research Statement or CV.

## Research

My research is primarily concerned with understanding various types of geometric structures on manifolds. Studying these structures typically involves the interplay of techniques from algebra, geometry, and topology.

My research is currently supported by the National Science Foundation (grant DMS-1709097)

### Papers

1. The moduli space of marked generalized cusps in real projective manifolds
joint with Daryl Cooper and Arielle Leitner, arXiv:2008.09553
2. Gluing equations for real projective structures on 3-manifolds
joint with Alex Casella, arXiv:1912.12508
3. Thin subgroups isomorphic to Gromov--Piateski-Shapiro lattices
arXiv:1911.06933
4. Constructing thin subgroups of SL(n+1,R) via bending
joint with Darren Long, Algebr. Geom. Topol. 20-4 (2020), 2071--2093
5. Constructing convex projective 3-manifolds with generalized cusps
arXiv:1805.09274
Supplemental Sage notebooks related to this work can be found here

### Work in progress

Copies may be available upon request

1. Properly convex Dehn filling
joint with Jeff Danciger, Gye-Seon Lee, and Ludovic Marquis
2. Complex projective structures on thrice punctured spheres
joint with Phil Bowers, Alex Casella, and Lorenzo Ruffoni
3. Neumann-Zagier relations for projective gluing equations
joint with Alex Casella

## Teaching

### Outreach

Math Fun Day

• Wisdom of the masses: a talk about using probability to calculate $$\pi$$.
(Fall 2017)
• Measuring lengths with the Steinhaus Longimeter
(Spring 2020)

## Activities

### Upcoming Travel

Travel currently suspended due to COVID-19

### Invited Talks

1. Gluing equations for projective structures on 3-manifolds (Slides, Video)
(Trends in Low Dimensional Topology, Online Seminar, 6/23/2020)
2. Gluing equations for projective structures on 3-manifolds
###### Cancelled due to COVID-19
(Oklahoma State Topology Seminar, 4/13/2020)
3. Gluing equations for projective structures on 3-manifolds
###### Cancelled due to COVID-19
AMS Sectional Meeting, Charlottesville, VA 3/14/2020)
4. Gluing equations for projective structures on 3-manifolds
(FRG Workshop, University of Michigan, 12/7/2019)
5. Gluing equations for projective structures on 3-manifolds
(Informal Topology Seminar, Stanford University, 3/19/2019)
6. Thin subgroups of SL(n+1,R) via bending
(Topology Seminar, Rice University, 2/18/2019)

### Things I'm Organizing/Have Organized

1. AMS Sectional Meeting
on Geometric Structures on Manifolds
(University of Florida, 11/2-11/3/2019)
2. UF/FSU Topology and Geometry Meeting
(Florida State University, 2/8-2/9/2019)
3. GEAR Junior Retreat 2017
(Stanford University, 7/31-8/5/2017)

### Topology and Geometry Seminar

I will be organizing the Topology and Geometry Seminar this semester.

Unless otherwise noted below, our meetings this semester will take place this on Tuesdays at 3:35 and our meetings will take place at the following this Zoom link. The password for our meetings is the name of the only knot with crossing number 3.

The schedule can be found below. Please contact me if you are interested in giving a talk.

## Contact

321 Love Building