# Upcoming and Recent Seminars - 2022/23

## Block 6 Seminars

#### Friday Mar 3

**3:00-4:00pm, Tutt Science 229 Prof. Joseph Rennie - “What is a Galois Theory? Math as a Structure Through a Homotopical Lens”**

Abstract:

In this talk about math, structures invented to analyze topological spaces emerge as the proper lens for viewing Galois Theory. The goal of this talk will be to give a sense of what it is like to know homotopy theory and higher category without requiring the audience to know either. We will see how naturally curiosity can take a real-world interest to a deep and gratifying insight about the structure of math itself. Of course, we will conceptually cover Galois Theorems multiple times over as we attempt to unify them under one result.

Rated PG-13: Considerable undergraduate math experience recommended.

#### Friday Mar 10

**12:30-1:30pm, Kresge Lecture Hall (Tutt Science 122) Prof. Cory Scott - “Computer Scientists Need Derivatives Too: An Introduction to Optimization”**

Abstract:

Across all fields of science and engineering, we frequently need to optimize a function: we have some function f, and we want to find a choice of x that will make f(x) as large as possible. f can be a mathematical function, or something more complicated, like the error between a machine learning model's prediction and the "right" answer. Optimization is a really broad field with many different techniques for specific kinds of functions. In this talk, I'll introduce some examples of optimization algorithms, and demonstrate how they work. I'll also discuss what makes a particular algorithm suitable for specific kinds of problems. If I have time, at the end I'll talk about a couple of optimization algorithms that crop up in my research.

Rated PG: Some calculus knowledge suggested but not required.

#### Friday Mar 17

**2:30-3:30pm, Tutt Science Center 229 Dr. Steve Getty - “Stay Motivated! Understanding and Monitoring Student Motivation in College”**

Abstract:

Motivation is essential in students’ academic performance, engagement, and persistence, and a body of work has laid a foundation for the role that individual motivation plays in educational contexts. This is especially important when students doubt their ability, see little value for engaging in classroom activities, or feel their efforts for success come at too high of a price. While many motivational theories, models have been proposed in such settings, Expectancy-Value Theory provides a comprehensive approach for understanding student achievement and persistence. In this talk, I will 1) *briefly* share the rationale for 3 factors for student motivation in STEM (CFA, Confirmatory Factor Analysis), 2) share data on measuring student motivation in courses at Colorado College, and then 3) discuss implications for students in understanding, supporting their motivation (….and possibly how instructors can support motivation in their courses).

Rated G: No mathematics or computer science background required!

## Block 5 Seminars

#### Friday Feb 17

**3:00-4:00pm, Tutt Science 221 Prof. Molly Moran - “Cutting Sequences in Euclidean and Hyperbolic Geometry”**

Abstract:

Our talk is motivated by a simple question: how do we calculate the slope of a line? Wait...isn't the answer just as simple as rise over run? Yes! But to calculate rise over run, we need at least two points that we know lie on the line. If we are only given a graph and there are no integer points on the line, finding these two points can be challenging. In this talk, we will introduce cutting sequences of lines and show how they can help us find slope. We will also explore what type of information these cutting sequences provide if we switch to hyperbolic geometry.

## Block 4 Friday Seminars

#### Each Thursday and Friday Dec 1 - 16

This block our talks will be presented by three prospective faculty candidates.

**Each THURSDAY there will be a research focused talk from 3PM to 4PM.**

**Each FRIDAY there will be a student focused talk from 12:30PM to 1:30PM (with pizza at noon!)**

These talks are write-up eligible for our majors, so please watch for more information on the topics and location. See you there!

## Block 3 Fearless Friday Seminars

#### Friday Oct 28 2022

**2:30-3:30pm, Tutt Science 229 Prof. Cory Scott - “Graph Lineages and Skeletal Graph Products”**

Abstract:

Machine learning models are limited by the "curse of dimensionality": we only have a fixed amount of memory and computing power, so we have to decide where to use it effectively. As a specific example, machine learning models for images often have to deal with a tradeoff between spatial resolution (how many pixels are in the image) and semantic resolution (how complex an idea our model can express). Many machine learning models get around this tradeoff by gradually shrinking the spatial resolution, while at the same time increasing the feature resolution. In my talk, I will explain how these types of model growth and shrinkage can be described by "graph lineages": growing sequences of related graphs. I will also define "skeletal" graph products, which are a way to combine graph lineages to get another lineage. I will demonstrate how we can use skeletal graph products to build some well-known machine learning models which have the same spatial vs. semantic tradeoff described above. This talk will touch on graph neural networks, clustering algorithms, linear algebra, and matrix decomposition. The last few minutes of the talk will be devoted to brainstorming potential applications of this model architecture.

#### Friday Nov 4 2022

**12:30 to 1:30PM: location TBADr. Rebecca Mitchell**

This CC alum who will be visiting next block to teach Linear Algebra works at the National Renewable Energy Laboratory (NREL) as a researcher, info here. This talk is **write up eligible** and more specifics to come!

#### Friday Nov 11 2022

**3:00 to 4:00PM: location TBAProf. Flavia Sancier-Barbosa**

Widely admired Colorado College mathematics professor Flavia Sancier-Barbosa has a passion for stochastic processes, probability, applied data analysis, and mathematical finance, but more details about this **write up eligible** talk to come!

## Block 2 Fearless Friday Seminars

## Block 1 Fearless Friday Seminars

#### Friday Sep 2 2022

**12:30pm in Tutt Science Lecture Hall (TSC122)**

Math and CS Faculty Research Interests

Followed by Ice Cream Social outside in 1:30pm

#### Friday Sep 9 2022

**12:30pm in TSC 122 Lecture Hall**

*Pizza at noon outside Tutt Science*

Dr. Justin Cole - Dept. of Mathematics, UCCS: An Introduction to Some Rogue Wave Models

*Rating*

*PG-13. Considerable undergraduate mathematics or computer science assumed*