# Events for 09/25/2020 from all calendars

## Mathematical Physics and Harmonic Analysis Seminar

**Time: ** 1:50PM - 2:50PM

**Location: ** Zoom

**Speaker: **Jiaqi Yang, GeorgiaTech

**Title: ***Persistence of Invariant Objects in Functional Differential Equations close to ODEs*

**Abstract: **We consider functional differential equations which are perturbations of ODEs in $\mathbb{R}^n$. This is a singular perturbation problem even for small perturbations. We prove that for small enough perturbations, some invariant objects of the unperturbed ODEs persist and depend on the parameters with high regularity. We formulate a-posteriori type of results in the case when the unperturbed equations admit periodic orbits. The results apply to state-dependent delay equations and equations which arise in the study of electrodynamics. The proof is constructive and leads to an algorithm. This is a joint work with Joan Gimeno and Rafael de la Llave.

## Algebra and Combinatorics Seminar

**Time: ** 3:00PM - 4:00PM

**Location: ** Zoom

**Speaker: **Erika Ordog, Texas A&M

**Title: ***Minimal resolutions of monomial ideals*

**Abstract: **The problem of finding minimal free resolutions of monomial
ideals in polynomial rings has been central to commutative
algebra ever since Kaplansky raised the problem in the 1960s and
his student, Diana Taylor, produced the first general
construction in 1966. The ultimate goal along these lines is a
construction of free resolutions that is universal -- that is,
valid for arbitrary monomial ideals -- canonical, combinatorial,
and minimal. This talk describes a solution to the problem
valid in characteristic 0 and almost all positive characteristics.

## Open Teaching with Technology Forum

**Time: ** 3:30PM - 5:00PM

**Location: ** Zoom

**Speaker: **Vanessa Coffelt

**Description: **Join Zoom Meeting: https://tamu.zoom.us/j/93142718312?pwd=c2x5Zm5RZWdheEJ4SU40N3VYMlFpdz09 Meeting ID: 931 4271 8312