Department of Mathematics
Departmental Colloquium
On Thursday, December 3, 2009,
Dr. Houshang Sohrab, Professor of Mathematics at Towson
University, will present a colloquium entitled Subpolynomial and subexponential functions and spectra of PDE's.
Abstract: We shall discuss the spectral properties of certain algebras of partial/pseudo differential operators on
Euclidean space related to Schrödinger operators
H0 = -Δ+q, Dom(H0)=C0∞(Rn),
with potentials 1≤q∈C∞(Rn) satisfying various growth conditions.
The most elegant and symmetric example is an algebra based on the Hermite operator H0 = -Δ+|x|2+1
and provides the spectral properties of partial differential operators with polynomial coefficients. Its structure makes it the
most natural candidate for investigating the index of Fredholm operators with polynomial coefficients. To study operators with
coefficients growing at infinity faster than polynomials, we provide simple criteria for the case of "subexponential growth"
and indicate the use of "direct spectral method" to find the spectra of related nonuniformly elliptic operators.
This colloquium will be held in 7800 York Road,
Room 320. The presentation will begin at 4:00 p.m., with light refreshments at 3:30 p.m.
On Friday, December 4, 2009,
Dr. Jianya Liu, Professor of Mathematics at Shandong
University, China, and a Member of the Institute for
Advanced Study, Princeton, will present a colloquium entitled
Finding primes on orbits.
Abstract: The distribution of primes is one of the oldest
problems in mathematics. Recently, Bourgain, Gamburd, and Sarnak have
proposed a general conjecture which includes many previous results and
conjectures concerning primes. In this talk, I will revisit classical
results and report new results in the direction of the BGS conjecture.
This colloquium will be held in 7800 York Road,
Room 320. The presentation will begin at 1:30 p.m., with light refreshments at
2:30 p.m.
Past talks include:
- On Thursday, September 24, 2009,
Dr. Jung Jin Lee, Professor of Statistics at Soongsil University, Korea, and Visiting Professor of Mathematics at Towson University,
presented a colloquium on Text mining using
a rule-based classifier.
- On Thursday, October 22, 2009,
Dr. Q. Helen Li, Lecturer of Mathematics at Towson University,
presented a colloquium entitled Optimal approximation spaces for problems with rough coefficients.
Mathematics Faculty Seminar
Starting in the Fall'2009 semester, the Department has initiated a new faculty-to-faculty seminar. The purpose of this new endeavor is to provide a venue where faculty can present a survey of an area of mathematics that they are familiar with to their colleagues. The topics in this seminar series will be broader than in our regular colloquium, and the lectures will aim more to enrich the audience’s general mathematical background than to present a particular result of interest to the speaker. Lectures may also span multiple talks.
On Wednesday, November 18, 2009, Dr. Angel Kumchev, Assistant Professor of Mathematics, will present
part II of a lecture on The Distribution of Primes and the Riemann Hypothesis. The lecture will be held in 7800 York Road, Room 320, between 3:30 and 4:45 p.m.
Research Seminar in Approximation Theory
This is a working research seminar. Contact Dr. Tatyana Sorokina or Dr. Sergiy Borodachov if you want to find about forthcoming topics or are interested in giving a talk.
The next talk will take place on Wednesday, September 23,
2009, beginning at 11:45 a.m. in YR 320. The speaker will be
Dr. Q. Helen Li.
The Department of Mathematics at Towson University also encourages your participation at other local area college and university mathematics colloquia and at the University of Maryland College Park. Links to these other colloquia are found below:
Department of Mathematics
7800 York Road, Room 316 (campus map)
Hours: Monday - Friday, 8:30 a.m. – 5 p.m.
Phone: 410-704-3091
Fax: 410-704-4149
E-mail: math@towson.edu
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