Seminar Series

Upcoming Seminars


Recent Seminars


Date and Time:  Friday, April 16, at 8:50 AM

Location:  Zoom link

Speaker:  Marat Markin

Title:  On Spectral Mapping Theorems and Asymptotics of Scalar Type Spectral C0-Semigroups

Abstract:  We establish spectral inclusion and mapping theorems for scalar type spectral operators and thereby extend a weak spectral mapping theorem and a generalized Lyapunov stability theorem, known to hold for the C0-semigroups of normal operators on complex Hilbert spaces, to the more general case of the C0-semigroups of scalar type spectral operators on complex Banach spaces. For such semigroups, we also obtain a spectral mapping theorem for point and continuous spectrum and exponential estimates with the best stability constants. Further, we extend to a Banach space setting the Gearhart-Prüss-Greiner characterization of uniform exponential stability for C0-semigroups on complex Hilbert spaces and acquire as an instant corollary a characterization of uniform exponential stability for scalar type spectral and eventually norm-continuous C0-semigroups.


FALL 2020

Date and Time: Friday, October 30, at 9 AM 

Location: Zoom link

Speaker: Marat Markin

Title: On Weak Spectral Mapping Theorems, Spectral Structure and Asymptotics of C0-Semigroups Generated by Scalar Type Spectral Operators

Abstract: We establish a weak spectral mapping theorem for scalar type spectral operators and apply it to extend a weak spectral mapping theorem and the generalized Lyapunov stability theorem, known to hold for the C0-semigroups of normal operators on complex Hilbert spaces, to the more general case of C0-semigroups of scalar type spectral operators on complex Banach spaces. For such semigroups, we also reveal finer spectral structure, obtain exponential estimates, and establish an analogue of the Gearhart-Prüss-Greiner characterization of the uniform exponential stability for C0-semigroups on complex Hilbert spaces.

Date and Time: Friday, October 23, at 9 AM

Location: Zoom

TitleAutomorphism Groups of Spatial Graphs and Hyperplane Arrangements over Finite Fields

Speaker: Oscar Vega


Date and Time: Friday, September 25, at 9 AM 

Location: Zoom

Title: Zero distribution of a Sheffer sequence

Speaker: Khang Tran



Date and Time: Friday, September 11, at 9 AM

Location:  Zoom

TitleStudying Heuristics and Problem Solving: Highlights of my work during My Difference in Pay Leave

Speaker: Agnes Tuska

Abstract:  As I planned in my Difference in Pay Leave application for the 2019-2020 academic year, I helped Dr. Andrew Benedek to organize and run the 2nd International Conference on Heuristics: Motivating, Orienting and Modeling Invention in Balatonfured, Hungary, August 30-September 1, 2019. The program of the conference is available at the website

As a continuation of our work, I proposed and led the organization of a special session on How to Solve It? Heuristics and Inquiry Based Learning with co-organizers Mario Banuelos and Andrew Benedek for the American Mathematical Society’s Spring Western Sectional Meeting,

California State University, Fresno, May 2-3, 2020


I was a scheduled presenter there. The conference was cancelled due to the pandemic. However, I decided to give the presentation I planned for the AMS meeting on George Polya’s influence on mathematics competitions in the USA at the History of Mathematics & Teaching of

Mathematics International Conference (see ), in which I was a member of the Organizing and Scientific Committee. During April, we re-organized the conference into a virtual conference, still hosted by the University of Miskolc, May 20-24, 2020. Later, as invited speaker, I also presented an extended version of this talk at the online Summer University/Intensive Course on “Central European Contributions to the History of Mathematics and Teaching Mathematics”, organized by the CEEPUS Network, coordinated by the University of Miskolc, July 6-17, 2020. Now I want to share some of my findings with you in the Fresno State community, too!

FALL 2019

Date and Time: Friday, November 8, 2019, at 9 AM

Location:  PB 032

TitleOn the Gevrey Ultradifferentiability of Weak Solutions of an Abstract Evolution Equation

Speaker: Marat Markin 

Abstract:  Abstract for November 8


Date and Time: Friday, October 18, 2019, at 9 AM

Location: PB 032

Title: Two-intersection sets in the project space PG(3,9)

Speaker:  Morgan Rodgers


Abstract for October 18, 2019 Seminar


Date and Time: Friday, September 27, 2019, at 9 AM

Location: PB 032

Title: Rainbow Spanning Trees in Edge-Colored Complete Graphs

Speaker: Katherine Perry, Ph.D. (Soka University)


abstract for Sept. 27 seminar




If you need a disability-related accommodation or wheelchair access information, please contact the mathematics department at 559.278.2992 or e-mail  Requests should be made at least one week in advance of the event.

Archived Seminars