Seminars and events this week in math.

Location:
INGR 3102; 3102
Cost:
Free
Contact:
Dr. Piyush Shroff (pshroff@txstate.edu)
Campus Sponsor:
Society for Industrial and Applied Mathematics
Society for Industrial and Applied Mathematics (SIAM) fosters the development of applied mathematical and computational methodologies needed in various application areas. Applied mathematics, in partnership with computational science, is essential in solving many real-world problems. Through publications, research and community, the mission of SIAM is to build cooperation between mathematics and the worlds of science and technology. Click here for more information
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Location:
DERR 330; 330
Cost:
Free
Contact:
Jackson Rebrovich (jdr134@txstate.edu)
The Math Club is a student-led organization for anyone who enjoys problem-solving, logical thinking, and exploring math beyond the classroom. Whether you love tackling challenging puzzles, preparing for competitions, or just want to sharpen your skills with friends, our club offers a fun and supportive environment to learn, collaborate, and grow. No matter your experience level, curiosity is all you need—come think, solve, and discover with us!
Our theme for the semester will be:  
"Learn Math with AI''
Click here for more information
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Location:
DERR 338; 338
Cost:
Free
Contact:
Hamilton Hardison
hhardison@txstate.edu
Campus Sponsor:
Department of Mathematics
Faculty and students learn about and discuss issues related to the teaching and learning of mathematics and new findings in mathematics education research. Graduate students in the Mathematics Education programs are expected to attend whenever possible; students from other programs are always welcome. Click here for more information
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Location:
DERR 121; 121
Cost:
Free
Contact:
Cameron Farnsworth
cfarnsworth@txstate.edu
Campus Sponsor:
Department of Mathematics
Love a good problem?  Like to solve difficult puzzles?
Join professors, graduate students and undergraduates as we tackle problems presented from several mathematical journals.  An interest in higher level mathematics is all that is required to join our round table.  Offer what you know, learn what you don't in a relaxed environment with some of our department's finest!
Click here for more information
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Location:
DERR 333; 333
Cost:
Free
Contact:
Vera Ioudina
vi11@txstate.edu
Campus Sponsor:
Department of Mathematics
Cameron Esponge - Texas State University
Graduate Student Talk: Kernel Methods for Multinomial Logistic Regression

Abstract: In classical parametric regression we assume a known relationship between
explanatory and response variables. However, in reality, complex non-linear relationships are
common and require non-parametric regression models to yield more accurate prediction
results. One popular non-parametric regression model uses kernel methods. I will present the
multinomial distribution and its likelihood function, reproducing kernel Hilbert space, and the
representer theorem which will allow us to introduce kernels methods into a multinomial
logistic regression framework. I will discuss some performance results from kernel multinomial
logistic regression on the MNIST dataset. I will also discuss a procedure in which we extract
features from deep and convolutional neural networks to build kernels which minimize
prediction error in a kernel multinomial logistic regression framework. My future research will
involve how to choose the tuning parameter by cross validation using only a sample of the
original dataset.
Bio: Cameron Esponge is currently a master’s student in statistics concentration through the
Department of Mathematics at Texas State University. Cameron received his B.S. in Applied
Mathematics from Texas State University in 2023 and is also a United States Marine Corps
Veteran. Cameron is interested in Machine Learning and Theoretical Statistics and hopes to have
a career in Data Science/Analytics.
Here is the Zoom link for those who cannot attend in person 
https://txstate.zoom.us/j/84190833370?pwd=OzF6cbIZGLqT2fBnUGN8qQwCHSidVf.1
Meeting ID:  84190833370       Passcode: SS_Derr333
Click here for more information
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Location:
Online Only
Cost:
Free
Contact:
Young Ju Lee
yjlee@txstate.edu
Campus Sponsor:
Department of Mathematics
Dr. Peimeng Yin from University of Texas at El Paso
Title: A positivity-preserving hybrid DDG method for Poisson--Nernst--Planck systems.
Abstract: In earlier work [H. Liu and Z. Wang, J. Comput. Phys., 328(2017)], an arbitrary high-order conservative and energy-dissipative direct discontinuous Galerkin (DDG) scheme was developed. Although this scheme enforced solution positivity using cell averages as reference values, it lacked a theoretical guarantee for the positivity of those cell averages.  In this study, we develop a novel arbitrary high-order DDG method with rigorously proven positivity-preserving properties. Specifically, the positivity of the cell averages is ensured through a modified numerical flux in combination with forward Euler time discretization. To achieve point-wise positivity of ion concentrations, we introduce a hybrid algorithm that integrates a positivity-preserving limiter. The proposed method is further extended to higher-dimensional problems with rectangular meshes.   Numerical results confirm the scheme's high-order accuracy, guaranteed positivity preservation, and consistent discrete energy dissipation. This is joint work with Hailiang Liu and Zhongming Wang.
Click here for more information
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Location:
DERR 329; 329
Cost:
Free
Contact:
Jeremiah Birrell
jbirrell@txstate.edu
Campus Sponsor:
Department of Mathematics
The math department hosts a colloquium series in which distinguished researchers present their recent work to a general mathematical audience.  All faculty, graduate students and undergraduate students are welcome. Click here for more information
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Location:
DERR 238; 238
Cost:
Free
Contact:
Illona Weber ih10@txstate.edu
Campus Sponsor:
Department of Mathematics
Math CATS is here to assist in almost all MATH courses!  If you're intimidated by the subject, come in and let's problem solve together.  Tutors are here to help reiterate, reinforce and help you relate to the content you heard in lecture. FREE & NO APPOINTMENT NEEDED! Click here for more information
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Professor speaking at a colloquium

Colloquium

The math department hosts a colloquium series in which distinguished researchers present their recent work to a general mathematical audience.  All faculty, graduate students and undergraduate students are welcome.

View a short video about our Colloquium series

Organizer: Jeremiah Birrell

Algebraic Combinatorics Reading Seminar

This seminar meets about once a week.  The format is very informal, the idea is that we collectively select a topic for the semester and present material surround that theme.  Original research is not typically presented and we encourage participation from all levels. Graduate students with an interest in algebra/combinatorics are especially encouraged to attend. 

For more information or to be included in communication regarding this seminar please contact Anton Dochtermann.

reading seminar logo
professor leading a seminar

Differential Equations and Applied Math Seminar (DEAM)

The Differential Equations and Applied Math Seminar is a seminar for those interested in differential equations, mathematical modeling, mathematical physics, scientific computation, and any other interdisciplinary mathematical work of an applied nature.  The speaker's topics are not restricted to their own work, as this seminar is a platform for presenting details of mathematics of interest.  Interested faculty, graduate students, and advanced undergraduates are encouraged to attend.

Organizers: Ray Treinen & Nestor Guillen

Discrete Math Seminar

All faculty, graduate students, and upper level undergraduate students are welcome. The seminar will provide a platform for faculty and students to present their research developments in discrete mathematics and related areas, foster research interactions among faculty and students, and create research opportunities and collaborations for faculty and students. Speakers from Discrete Mathematics, Combinatorics, Computer Science, and other related areas are all welcome. We are particularly interested in interdisciplinary research which applies mathematics as a tool to solve problems in other areas such as CS, BioInformatics, Bio‐sciences, Engineering, Physics, Chemistry, etc.

Organizer: Jian Shen

discrete math
Logic@TXST logo

Logic@TXST

This is a program designed to encourage research into mathematical logic at Texas State University and both the undergraduate and faculty levels, first by bringing in logic speakers to stimulate interest, and then fund subsequent research.

Times and locations of these talks will vary.

Organizer: Will Boney

Machine Learning Reading Seminar

In this seminar we learn about the mathematical foundation of this technology and their rapidly expanding use in our world.
All interested faculty, staff, and undergraduate and graduate students are welcome.

Organizer: Christine R.S. Lee

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a professor teaching a class

Math Education Seminar

Faculty and students learn about and discuss issues related to the teaching and learning of mathematics and new findings in mathematics education research. Graduate students in the Mathematics Education programs are expected to attend whenever possible; students from other programs are always welcome.

Organizers:  Hamilton Hardison

Numerical Methods for Data Science and Engineering (NMDSE)

This seminar is dedicated to sharing and discussing recent discoveries in numerical methods for real-life applications, such as medical imaging, weather forecasting, and epidemiology.

Organizers: Young Ju Lee & Xiaoxi Shen

digital circuit board and tablet matrix
student solving problems at a blackboard

Problem Solvers Group

Love a good problem?  Like to solve difficult puzzles?
Join professors, graduate students and undergraduates as we tackle problems presented from several mathematical journals.  An interest in higher level mathematics is all that is required to join our round table.  Offer what you know, learn what you don't in a relaxed environment with some of our department's finest!

View a short video about Problem Solvers

Organizers: Cameron Farnsworth

Statistics Seminar

Interested in Statistics and Data Science?  

Join us as we discuss new developments in statistics as well as innovative lessons and advances in statistics education research.
Graduate and undergraduate students are encouraged to attend!

View a short video about our Statistics seminar.

Organizer: Vera Ioudina 

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Talk Math 2 Me logo

Talk Math 2 Me

This is a seminar for students by students. Talk Math 2 Me provides students, both graduate and undergraduate, an opportunity to present anything related to mathematics to an audience of their peers. Undergraduate and Graduate math students or any students interested in mathematics are highly encouraged to attend. The talks are each 15‐60 minutes long and possible speaking topics include Undergraduate and Graduate mathematics research, math history, and STEM research with a heavy footing in mathematics.

View a short video about Talk Math 2 Me

Organizer: Ellen Couvillion

Topology Seminar

A seminar in topology: geometric, algebraic, general, abstract, combinatorial, and applied.  This is a faculty research seminar focused on topology and its applications.  Graduate and undergraduate students interested in topology and its applications are welcome to attend.

Organizer: Christine R.S. Lee

donut to coffee cup topology representaton
woman doing math

Women Doing Math

Organizer: Daniella Ferrero

Math & Stats Awareness Month

In April, the math department runs a series of annual presentations aimed at illuminating interdisciplinary connections between mathematics and other areas. We host guest speakers, partner with other departments within the university and invite panelists whose work relates to the presented themes. All presentations are geared toward the general audience. Everyone is invited.

Organizer:  Hiroko Warshauer

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