BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Mathematics - ECPv4.8.0.1//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Mathematics
X-ORIGINAL-URL:https://math.ua.edu
X-WR-CALDESC:Events for Mathematics
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20190201T110000
DTEND;TZID=America/Chicago:20190201T120000
DTSTAMP:20190215T214019
CREATED:20190131T213840Z
LAST-MODIFIED:20190131T213859Z
UID:3738-1549018800-1549022400@math.ua.edu
SUMMARY:Applied Math Seminar - Yuhui Chen\, University of Alabama
DESCRIPTION:Title: Bayesian Nonparametric Models and Its Applications \nAbstract: Polya tree priors are random probability measures that are easily centered at standard parametric families\, such as the normal. As such\, they provide a convenient avenue toward creating a parametric/nonparametric model for data. Briefly\, we center a Polya tree at an initial parametric guess on data; then by adding more details via data\, departures from the initial guess will be captured and used for adjusting the guess to obtain a robust nonparametric estimation. We utilize the Polya tree for the classic problem of testing whether data distributions are the same across several subpopulations. Test-statistics that are (empirical) Bayes factors constructed from independent Polya tree priors are proposed. Generalizations to censored and multivariate data are provided. The conceptually simple test statistic fares surprisingly well against competitors in simulations. \nIn addition\, we propose a novel weighted multivariate Polya tree and use it in control scheme for detecting small mean and/or variance shifts in various types of control processes. By further weighting the Polya tree in the test statistic\, the control chart now can heighten the sensitivity of detecting one or more out of control characteristics. Examples show that our chart performs well in monitoring a multivariate process where the normality assumption is violated. \n
URL:https://math.ua.edu/event/applied-math-seminar-yuhui-chen-university-of-alabama/
LOCATION:346 Gordon Palmer Hall
CATEGORIES:Applied Math Seminar,Math Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20190204T100000
DTEND;TZID=America/Chicago:20190204T110000
DTSTAMP:20190215T214019
CREATED:20190117T141424Z
LAST-MODIFIED:20190117T141703Z
UID:3718-1549274400-1549278000@math.ua.edu
SUMMARY:Algebra/Topology Seminar - Christine Ruey Shan Lee\, University of South Alabama
DESCRIPTION:
URL:https://math.ua.edu/event/algebra-topology-seminar-christine-ruey-shan-lee-university-of-south-alabama/
CATEGORIES:Algebra/Topology Seminar,Math Department
ORGANIZER;CN="Bulent%20Tosun":MAILTO:btosun@ua.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20190204T110000
DTEND;TZID=America/Chicago:20190204T120000
DTSTAMP:20190215T214019
CREATED:20190108T194612Z
LAST-MODIFIED:20190201T205330Z
UID:3689-1549278000-1549281600@math.ua.edu
SUMMARY:Analysis Seminar - Christoph Fischbacher\, University of Alabama at Birmingham
DESCRIPTION:Title: Area Laws for the Entanglement in the XXZ spin chain \nAbstract: The question on how to rigorously define and prove Many-Body-Localization (MBL) phenomena has attracted significant interest over the recent years. In this talk\, we will give a physical motivation for the so-called entanglement entropy (EE) and explain why an area law for the EE can be interpreted as a sign of MBL. We then introduce the Heisenberg XXZ spin Hamiltonian\, which is unitarily equivalent to a direct sum of discrete many-particle Schrödinger operators with an attractive potential that energetically favors the formation of clusters of particles. After this\, we present a (log-corrected) area law that works for any state corresponding to a finite but arbitrary number of such clusters. This is joint work with H. Abdul-Rahman (U of Arizona) and G. Stolz (UAB). \n
URL:https://math.ua.edu/event/analysis-seminar-christoph-fischbacher-university-of-alabama-at-birmingham/
LOCATION:346 Gordon Palmer Hall
CATEGORIES:Analysis Seminar,Math Department
ORGANIZER;CN="Kabe%20Moen":MAILTO:kabe.moen at ua.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20190205T173000
DTEND;TZID=America/Chicago:20190205T183000
DTSTAMP:20190215T214019
CREATED:20190128T173531Z
LAST-MODIFIED:20190128T173531Z
UID:3735-1549387800-1549391400@math.ua.edu
SUMMARY:AWM Welcome Meeting
DESCRIPTION:
URL:https://math.ua.edu/event/awm-welcome-meeting-2/
LOCATION:234 Gordon Palmer Hall\, AL\, United States
GEO:32.3182314;-86.902298
ORGANIZER;CN="Keisha%20Cook":MAILTO:kjcook3@crimson.ua.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20190215T110000
DTEND;TZID=America/Chicago:20190215T120000
DTSTAMP:20190215T214019
CREATED:20190212T222657Z
LAST-MODIFIED:20190212T223114Z
UID:3767-1550228400-1550232000@math.ua.edu
SUMMARY:Applied Math Seminar - Shibin Dai\, University of Alabama
DESCRIPTION:Title: Degenerate Diffusion in Phase Separations \nAbstract: Phase separations are widely observed phenomena in materials science. One model of phase separation is the Cahn-Hilliard equation with a smooth double-well potential\, and with phase-dependent diffusion mobilities. The latter is a feature of many materials systems and makes the analysis and accurate numerical simulations challenging. In this talk I will discuss three aspects of the degenerate Cahn-Hilliard equations:\n1. the sharp-interface limit via asymptotic analysis\, and the dynamics in different time scales;\n2. the accurate numerical simulation results that confirm the behavior predicted by asymptotic analysis;\n3. the existence of weak solutions for the degenerate Cahn-Hilliard equation.\nI will also briefly discuss several directions for further exploration. \n
URL:https://math.ua.edu/event/applied-math-seminar-shibin-dai-university-of-alabama-2/
LOCATION:346 Gordon Palmer Hall
CATEGORIES:Applied Math Seminar,Math Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20190219T110000
DTEND;TZID=America/Chicago:20190219T120000
DTSTAMP:20190215T214019
CREATED:20190208T154000Z
LAST-MODIFIED:20190208T155343Z
UID:3763-1550574000-1550577600@math.ua.edu
SUMMARY:Research Talk - Xin Zhou\, University of California\, Santa Barbara
DESCRIPTION:Title: Multiplicity One Conjecture in Min-max theory \nAbstract: I will present a recent proof of the Multiplicity One Conjecture in Min-max theory. This conjecture was raised by Marques and Neves as the key step to establish a Morse theory for the area functional. It says that in a closed manifold of dimension between 3 and 7 with a bumpy metric\, the min-max minimal hypersurfaces associated with the volume spectrum introduced by Gromov\, Guth\, Marques-Neves are all two-sided and have multiplicity one. As direct corollaries\, it implies the generalized Yau’s conjecture for such manifolds with positive Ricci curvature\, which says that there exist a sequence of minimal hypersurfaces with area tending to infinity\, and the Weighted Morse Index Bound Conjecture by Marques and Neves. The talk will be for general audience. \n
URL:https://math.ua.edu/event/colloguium-xin-zhou-university-of-california-santa-barbara/
LOCATION:346 Gordon Palmer Hall
ORGANIZER;CN="David%20Cruz-Uribe":MAILTO:dcruzuribe at ua.edu
END:VEVENT
END:VCALENDAR