## GAUSS (Graduate and Undergraduate Students Seminar)

## Upcoming Seminars

**When: **Friday, October 12th, 2018 at 4pm in PB 012

**Presenter**: Oscar Castanos (Fresno State student)

**Title**: On Volterra Quadratic Stochastic Operators of a Two-Sex Population

** Abstract: **We consider a family of operators which model the behavior of a current generation
and its trajectory for future generations. We observe the fixed points of our operators
and the way trajectories behave around these fixed points. We use the eigenvalues
of the Jacobian matrix of our operator to find the type of fixed points of the operator.

## Past Seminars

**When:** Friday, February 2nd, 2018 at 3 pm in PB 012

**Presenters:** Ariana Cavazos and Abigayle Dirdak (Fresno State Students)

**Title: **Knot or Not a Knot? - A Game on Knot Diagrams

**When:** Friday, February 9th, 2018 at 3 pm in PB 012

**Presenters:** Emma DenBesten, Maria Diaz, and Yuliana Segura (Fresno State Students)

**Title: **Exploding Dots

**When**: Thursday, October 26th, 2017 at 4pm in PB 033

**Presenter:** Ariana Cavazos (Fresno State student)

**Title:** An Analysis of Obesity and Climate Change in the United States

**Abstract:** Obesity and climate change have become a major issue in the United States. To gain
a better understanding on how obesity impacts the environment, we analyzed Edwards
and Roberts' study (2009), "Population adiposity and climate change." They made very
strict assumptions regarding the United Kingdom in the 1970s and in 2010. To better
represent the United States, we made our own assumptions so we could grasp an understanding
on how changes in BMI are affecting greenhouse gas emissions. Specifically, the study
focuses on greenhouse gases emitted from food production, vehicle transportation,
and air travel. We found that their assumptions were relatively consistent with our
normal weight population. However, Edwards and Roberts' predicted 2010 population
had greatly underrepresented estimates compared to our hypothetical overweight population,
thus suggesting that a raise in BMI is indeed causing greater emissions to be emitted
due to food production, vehicle emissions, and aviation fuel demands.

**When:** Thursday, September 28th, 2017 at 4 pm in PB 033

**Presenter:** Abigayle Dirdak (Fresno State student)

**Title:** Virtual Trivalent Braids

**Abstract:** This talk is based on my summer research experience during the 2017 Mathematics REU
(Research Experience for Undergraduates) at Fresno State. Come learn some cool stuff
about braids and their geometric and algebraic properties.

**If you need a disability-related accommodation or wheelchair access information, please
contact the Mathematics Department at 559.278.2992 or e-mail **math.office@csufresno.edu. **Requests should be made at least one week in advance of the event.**