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Upcoming Seminars
Monday, November 26, 2007
APPLIED ANALYSIS AND PDE READING SEMINAR PSA 304 1:40 p.m.
Moderators: Slim Ibrahim, Svetlana Roudenko, Sergei Suslov,
Department of Mathematics and Statistics
"Local and Global Analysis of Nonlinear Dispersive Equations"
ABSTRACT: We study in details modern approaches in Analysis and
Nonlinear PDEs based on the book from CBMS series by Terence
Tao (Field's Medalist 2006). Graduate students and postdocs are
especially welcome.
TUESDAY, November 27, 2007
MATHEMATICS AND COGNITION SEMINAR ISTB1 401 12:15 p.m.
Edward Palazzolo, School of Communication
"Communicating Networked Knowledge"
ABSTRACT: This work focuses on the initial conditions of work
teams and the impacts of these conditions on the development of
teams' transactive memory (TM) systems through computational
modeling. TM theory describes the conditions under which team
members retrieve and allocate information to accomplish
collective tasks. Field research does not allow for the
extensive manipulation of initial conditions a team might face
when working together; conversely, this experimental research
allowed for such manipulations without negatively impacting the
ongoing productivity of organizations. Initial knowledge,
initial accuracy of expertise recognition, and network size are
explored as predictor variables on the development of a TM
system as mediated through communication. System development is
measured by the degree to which team members accurately
perceive other members' expertise and the extent to which the
system has differentiated its stored knowledge.
WEDNESDAY, November 28, 2007
NUMBER THEORY SEMINAR PSH 552 10:40 a.m.
Chase Franks, Department of Mathematics and Statistics
"On the mu-invariant of the Gamma-transform of a Rational
Function"
ABSTRACT: p-adic L-functions arise as Gamma-transforms of
p-adic measures that are constructed from rational functions.
Following Sinnott, we will compute the mu-invariant of the
Gamma-transform of a rational function measure. This will lead
to a proof of the Ferrero-Washington theorem, which says that
mu = 0 for the basic \mathtbf{Z}_{p}-extension of an abelian
number field.
SOCIETY FOR GRADUATE WOMEN IN MATHEMATICS
MEETING PSA 230 12:40 p.m.
Marilyn Carlson, Center for Research on Education in Science,
Mathematics, Engineering and Technology
AGENDA: Dr. Marilyn Carlson will be leading a discussion on
job search experience and interview process as it pertains to
women in mathematics, statistics, and other sciences. Graduate
students, faculty members, and advanced undergraduates are
invited to join the discussion of these issues and to share
their thoughts and experiences.
Please e-mail patani@mathpost.asu.edu if you have any
questions or comments.
Pizza and drinks will be served at 12:40 p.m.
COMPRESSIVE SENSING SEMINAR ECA 225 4:00 p.m.
(In cooperation with Department of Electrical Engineering)
Hans Mittelmann, Department of Mathematics and Statistics
"Convex Optimization in Compressive Sensing and related
Software"
ABSTRACT: We will start by reviewing and completing the
material presented by Candes last week, especially on primal-
dual interior point methods. Then we will give an overview of
available software and do some comparisons between various
packages.
FRIDAY, November 30, 2007
ALGEBRAIC COMBINATORICS "WORKING" SEMINAR PSA 302 3:00 p.m.
Hélène Barcelo, Department of Mathematics and Statistics
"Associahedra and Mutations, Part 2"
ABSTRACT: In the last few years there has been a large number
of papers devoted to the associahedron and its several
generalizations. This is in part due to the fact that this
polyhedron appears in so many contexts. For example, it was
considered by Penner and Waterman (1993) in the context of
mathematical biology, where it is used as an idealised model
for secondary RNA structure. Before this, it was in fact
introduced by Stasheff (1963) in the context of the theory of
operads. More recently, it has appeared in the combinatorics
community as well as in the algebra, geometry and category
ones. Relations between the associahedron and other
combinatorial objects include, restricted permutations, lattice
paths, trees, permutahedron, generalization of the Catalan
numbers, etc...
MATH BIOLOGY SEMINAR PSA 102 3:40 p.m.
Bingtuan Li, University of Louisville
"Existence of Traveling Waves for Integral Recursions with
Nonmonotone Growth Functions"
ABSTRACT: In this talk we will discuss integral recursion
models for the growth and spread of a synchronized single-
species population. It is well known that if there is no
overcompensation in the fecundity function, the recursion has
an asymptotic spreading speed, and that this speed can be
characterized as the speed of the slowest non-constant
traveling wave solution. It is also known that a class of
integral recursions with overcompensation still have asymptotic
spreading speeds. This presentation will give a large subclass
of these models with overcompensation for which the spreading
speed can still be characterized as the slowest speed of a non-
constant traveling wave. We will show numerical simulations
indicating that , depending on the properties of the fecundity
function, the tails of the waves may approach the carrying
capacity monotonically, may approach the carrying capacity in
an oscillatory manner, or may oscillate continually about the
carrying capacity, with its values bounded above and below by
computable positive numbers.
(Joint work with Hans Weinberger and Mark Lewis)
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