# Seminar

## Cardinal Bounds in Spaces with a π-Base Whose Elements have an H-Closed Closure

## Introduction to tropical geometry

It is the first meeting of Combinatorial Algebraic Geometry Reading seminar. I will give an introduction to tropical geometry.

## Combinatorial Algebraic Geometry Reading Seminar

It is a weekly seminar targeted at graduate students in algebra/geometry.combinatorics. The main topics are toric varieties, tropical geometry and matroids. We will base the seminar on Maclagan-Sturmfels book "Tropical Geometry".

The seminar will be on Zoom this term:

https://pitt.zoom.us/j/95537107311

## Patterns of Life: Mathematical Exploration of Self-Organization in Biological Systems

## Torsors

## All End Spaces of Infinite Graphs are Paracompact

## Sobolev extension domains and Poincaré inequalities

We investigate which domains in $\mathbb{R}^n$ allow extensibility of Sobolev functions. Such domains are called $W^{\{m,p\}}$ extension domains, we show that under mild hypothesis on the extension operator that these domains are equivalent to domains satisfying the local Poincaré inequality.

## Introduction to toric topology

## Contract Grading in Calculus 2

The Discipline Based Science Education Research Center (dB-SERC) will be hosting a lunch discussion where graduate student Edison Hauptman will be the speaker. If interested in attending please sign up here so that the organization can have an accurate head count for the lunch.