## Visiting Assistant Professor

Georgia Tech School of Mathematics

Skiles 017

skafer3 AT gatech DOT edu

## Research

I primarily study the theory of linear programming, often by way of polyhedral combinatorics and combinatorial optimization. I am particularly interested in the behavior of the Simplex method on lattice LPs and the combinatorial, monotone, and circuit diameters of polyhedra.

## History

**August 2023 – August 2025**: Visiting Assistant Professor at Georgia Tech’s School of Math**January 2023 – May 2023:**Postdoctoral Fellow at the Discrete Optimization: Mathematics, Algorithms, and Computation semester program at ICERM**September 2017 – August 2022:**Ph.D. student at University of Waterloo’s Department of Combinatorics & Optimization**September 2015 – September 2017:**Masters student at University of Waterloo’s Department of Combinatorics & Optimization

## Selected Publications

*Below, authors are listed in alphabetical order*

- S. Borgwardt, W. Grewe, S. Kafer, J. Lee, L. Sanità On the Hardness of Short and Sign-Compatible Circuit Walks (submitted to DAM) 2024
^{+} - A. Black, J. A. De Loera, S. Kafer, L. Sanità On the Simplex method for 0/1 polytopes (MOR 2024)
- J. A. De Loera, S. Kafer, L. Sanità Pivot Rules for Circuit-Augmentation Algorithms in Linear Optimization (SIOPT 2022)
- S. Kafer, K. Pashkovich, L. Sanità On the Circuit Diameter of some Combinatorial Polytopes (SIDMA 2019)
- V. E. Brimkov, K. Junosza-Szaniawski, S. Kafer, J. Kratochvil, M. Pergel, P.

Rzazewski, M. Szczepankiewicz, J. Terhaar Homothetic polygons and beyond: Maximal cliques in intersection graphs (DAM 2018)

## You may have recently seen me at…

**August 2024:**Discrete Optimization: Mathematics, Algorithms, and Computation*at ICERM***June 2024:**Mixed Integer Programming Workshop (MIP)*at University of Kentucky***March 2024:**Atlanta Lecture Series in Graph Theory and Combinatorics XXVIII*at Georgia Tech***May 2023:**Circuit Diameters and Augmentation: Recent Advances in Linear and Integer Optimization*at CU Denver***March 2023:**Combinatorics and Optimization Workshop*at ICERM*

## Teaching

**Spring 2025:**MATH 3012 Applied Combinatorics,*Georgia Tech***Fall 2024:**MATH 1113 Precalculus,*Georgia Tech***Spring 2024:**MATH 1551 Differential Calculus,*Georgia Tech***Fall 2023:**MATH 1553 Introduction to Linear Algebra,*Georgia Tech***Fall 2022:**MATH 1554 Linear Algebra,*Georgia Tech***Fall 2021:**CO 227 Introduction to Optimization (Non-Specialist Level),*University of Waterloo*