# Achievements

### Publications and achievements submitted by our faculty, staff, and students.

Faculty Kamila Larripa Mathematics

Kamila Larripa was selected to conduct research at the American Institute of Mathematics in June. She and collaborators will build stochastic models for immune cell dynamics.

Submitted: May 11, 2021Student Viri Macias, Ana Sammel, Emma Villegas, Bori Mazzag, Kamila Larripa Mathematics

Viri Macias, Ana Sammel and Emma Villegas presented their mathematical work at the CSU PUMP Symposium. Viri presented a model for calcium signaling and Ana and Emma presented a model for COVID-19 and immune cell interactions. The projects were mentored by Bori Mazzag and Kamila Larripa.

Submitted: May 11, 2021Student Bridget Opperman, Kamila Larripa Mathematics

Math student Bridget Opperman will present a research poster on “Mathematical Analysis of Virus-Immune Dynamics and Implications for Treatment” at the National Conferences on Undergraduate Research.

Submitted: April 12, 2021Faculty Bori Mazzag Mathematics

Dr. Bori Mazzag and Dr. Julie Glass, CSU East Bay, co-organized a series of CSU-wide talks in January as part of the year-long Math Council Colloquium series. The theme of the January talks was “Peer Instruction”. We aimed to connect faculty and staff across the CSU who work on providing academic support services to students in mathematics and statistics courses. In addition to the talks, we collected some information on the structure of the tutoring and peer instruction on the various campuses. CSU campuses were broadly represented in the series, including speakers from Humboldt State University’s Learning Center.

Submitted: March 7, 2021Faculty Peter Goetz, Andrew Conner Mathematics

Published the article “Classification, Koszulity and Artin-Schelter regularity of certain graded twisted tensor products” in the Journal of Noncommutative Geometry, DOI: 10.4171/JNCG/395

Submitted: February 17, 2021Student Cianna Balderama, Daisy Montalvo, Ashley Tran, Ana Sammel, Emma Villegas, Bridget Opperman, Makani Bright, Hunter Kahn, Soeon Park, Tanner Hooven, Kevin Chung, Diego Rodriguez Moreno Mathematics

Twelve CNRS students competed in the international Mathematical Contest in Modeling— an annual four day intensive competition. Teams of 3 worked intensely to apply mathematics to a real world problem. Students worked on mathematical models applied to competing populations of fungi, musical influence, and optimizing our nation’s delivery of higher education. The contest happened virtually due to the pandemic.

Submitted: February 12, 2021Faculty Kamila Larripa Mathematics

Kamila Larripa and co-authors had their paper accepted to the Journal of Theoretical Biology. The paper is entitled “Bifurcation and sensitivity analysis reveal key drivers of multistability in a model of macrophage polarization” and investigates how a specific immune cell responds to cytokine signals.

Submitted: October 2, 2020Faculty Peter Goetz Mathematics

Recently published the single-authored paper “Graded Coherence of Certain Extensions of Graded Algebras” in Communications in Algebra, June 2020, https://doi.org/10.1080/00927872.2020.1775844

The paper studies when the coherence property is inherited by certain extensions of algebras.

Submitted: August 26, 2020Faculty Bori Mazzag, Kamila Larripa, Viri Macias, Megan Johnson, Ana Sammel and Emma Villegas Mathematics

Bori Mazzag and Kamila Larripa each received a CSU PUMP grant to mentor students in mathematical research for the 2020/2021 academic year. Mazzag will investigate calcium dynamics using differential equations and graph theory with Viri Macias and Megan Johnson, and Larripa will model the interaction between Sars-CoV-2 and the host’s immune system, working with Ana Sammel and Emma Villegas.

Submitted: May 15, 2020Faculty Steven Railsback, Bret Harvey Mathematics

Steven Railsback (adjunct faculty, Mathematics) and Bret Harvey (adjunct, Fisheries Biology) just published the book “Modeling Populations of Adaptive Individuals”, volume 63 in the prestigious Princeton Monographs in Population Biology series. The book presents a new kind of theory for adaptive behavior of individual organisms (e.g., when and where to forage, considering both growth and predation risk) that works in complex individual-based population models. The book builds on HSU’s long tradition in individual-based ecological modeling. https://press.princeton.edu/books/paperback/9780691195285/modeling-populations-of-adaptive-individuals

Submitted: May 12, 2020Student Charlin Duff, Skye Gibney, Eric Malekos Mathematics

Charlin Duff, Skye Gibney and Eric Malekos received an Honorable Mention for their participation in the Mathematical Contest in Modeling. Their project used mathematical modeling to make policy suggestions with the goal of mitigating the detrimental effect of plastic waste on the environment.

Submitted: May 8, 2020Faculty Kamila Larripa Mathematics

Kamila Larripa coauthored the paper “A Tutorial Review of Mathematical Techniques for Quantifying Tumor Heterogeneity” which was accepted for publication. The work considers intra-tumor and inter-patient heterogeneity and mathematical models for precision medicine. It will appear in Mathematical Biosciences and Engineering.

Submitted: May 8, 2020Student Jahaira Valencia , Berlin Del Aguila, Griffin Kowash, Sam Mendez, Melanie Tapia, Johnny Rasnic, Daisy D. Montalvo , Edwin Espinoza, Julia Vang, Gynell Higby, Joshua Maldonado, Nicole Perry, Charlin Duff, Eric Malekos, Skye Gibney, Ryan Myers, Emily Ord, Alyssa Johnson, Cade Freels, Sonnet Antio, Ana Sammel, Christina Bewley, Mariah Graham, and Thomas Boerne Mathematics

HSU student participants in this year’s international Mathematical Contest in Modeling were Jahaira Valencia , Berlin Del Aguila, Griffin Kowash, Sam Mendez, Melanie Tapia, Johnny Rasnic, Daisy D. Montalvo , Edwin Espinoza, Julia Vang, Gynell Higby, Joshua Maldonado, Nicole Perry, Charlin Duff, Eric Malekos, Skye Gibney, Ryan Myers, Emily Ord, Alyssa Johnson, Cade Freels, Sonnet Antio, Ana Sammel, Christina Bewley, Mariah Graham, and Thomas Boerne. The contest challenges teams to clarify and analyze a real-world open-ended problem and propose a solution within a 99 hour time frame.

Submitted: February 19, 2020Faculty Bori Mazzag, Sonja Manor, Liza Boyle and Ruth Saunders Mathematics

HSU sub-award of the NSF-Funded SUMMIT-P Consortium. SUMMIT-P is a consortium of institutions committed to curricular innovations in the first two years of mathematics to improve the training of students in partner disciplines. Boyle, Mazzag and Saunders attended a SUMMIT-P workshop in Denver, Colorado.

Submitted: February 11, 2020Faculty Abeer Hasan Mathematics

Presented a contributed paper at the Joint Math Meeting in Denver, Colorado, Jan. 15-18, 2020.

Submitted: February 10, 2020Faculty Bori Mazzag Mathematics

Contributed talk at the Joint Mathematics Meetings “Corequisite courses and the STEM Pathway.”

Submitted: February 10, 2020Faculty Abeer Hasan Mathematics

Was offered a CURM (Center for Undergraduate Research in Mathematics) grant for the 2019-2020 academic year.

Submitted: February 10, 2020Faculty Bori Mazzag Mathematics

Panel discussion/talk at the Joint Mathematics Meetings “Advancing Mathematics Education at Scale” with co-authors Uri Treisman Dana Center, Julie Glass, CSU East Bay, Alana Unfried, CSU Monterey Bay, Michael O’Sullivan, San Diego State University

Submitted: February 10, 2020Faculty Kamila Larripa Mathematics

Was selected for participation in a summer research program for women hosted by the Mathematical Sciences Research Institute in Berkeley, CA. MSRI is widely regarded as a world leading mathematical center for collaborative research and is supported by the NSF.

Submitted: January 24, 2020Faculty Peter Goetz Mathematics

The paper Classification, Koszulity and Artin-Schelter Regularity of some Graded Twisted Tensor Products was accepted for publication in The Journal of Noncommutative Geometry, a publication of the European Mathematical Society.

Submitted: January 22, 2020