BEGIN:VCALENDAR VERSION:2.0 PRODID:-//University of Utah Math Department//Departmental Colloquium//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Departmental Colloquium - Spring 2010 X-WR-CALDESC:Departmental Colloquium at University of Utah Mathematics Department X-WR-TIMEZONE:America/Denver BEGIN:VEVENT UID:20100114T160000-christel-hohenegger@math.utah.edu DTSTART;TZID=America/Denver:20100114T160000 DTEND;TZID=America/Denver:20100114T170000 DTSTAMP:20260922T150858Z SUMMARY:Understanding the Dynamics and Mechanics of Complex Fluids DESCRIPTION:Speaker: Christel Hohenegger\, Courant Institute of Mathematical Science\n\nOne of the challenges in modeling the transport properties of complex fluids (e.g. many biofluids, polymer solutions, particle suspensions) is describing the interaction between the suspended micro-structure with the fluid itself. Here I will focus on my work in understanding the dynamics of active … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100126T160000-juan-souto@math.utah.edu DTSTART;TZID=America/Denver:20100126T160000 DTEND;TZID=America/Denver:20100126T170000 DTSTAMP:20260922T150858Z SUMMARY:Relations between geometry and topology of hyperbolic 3-manifold. DESCRIPTION:Speaker: Juan Souto\, University of Michigan\n\nBy Mostow's rigidity theorem, geometric invariants of hyperbolic 3-manifolds are in fact topological invariants. On the other hand, it follows from the work of Thurston and Perelman that a 3-manifold is hyperbolic if and only if it satisfies some rather mild conditions. In light of these results, it … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100128T160000-alexandra-pettet@math.utah.edu DTSTART;TZID=America/Denver:20100128T160000 DTEND;TZID=America/Denver:20100128T170000 DTSTAMP:20260922T150858Z SUMMARY:Out(F) and its relatives DESCRIPTION:Speaker: Alexandra Pettet\, University of Michigan\n\nThe outer automorphism group Out(F) of a free group of finite rank shares many properties with linear groups and the mapping class group Mod(S) of a surface, although the techniques for studying Out(F) are often quite different from the latter two. Motivated by analogy, I will present some results … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100209T160000-sunder-sethuraman@math.utah.edu DTSTART;TZID=America/Denver:20100209T160000 DTEND;TZID=America/Denver:20100209T170000 DTSTAMP:20260922T150858Z SUMMARY:Nonequilibrium limit for a tagged particle in a zero-range system DESCRIPTION:Speaker: Sunder Sethuraman\, Iowa State University\n\nThe 'zero-range' interacting particle system, introduced in the 70's, is a formal model of certain queues, traffic, and other physical phenomena. The system follows a collection of random walks on a lattice which interact in that the rate at which a particle jumps depends only on the occupation … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100211T160000-hai-long-dao@math.utah.edu DTSTART;TZID=America/Denver:20100211T160000 DTEND;TZID=America/Denver:20100211T170000 DTSTAMP:20260922T150858Z SUMMARY:Playing with Ext and Tor: study singularities via homological algebra DESCRIPTION:Speaker: Hai Long Dao\, University of Kansas\n\nTo understand an algebraic object (groups, rings, etc.) it often pays to understand some category such object acts on. For example, when our object is a commutative ring R, we wish to explore the category mod(R) of (finitely generated) modules over R. Two fundamental operations in mod(R) are tensor … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100216T160000-cecilia-diniz-behn@math.utah.edu DTSTART;TZID=America/Denver:20100216T160000 DTEND;TZID=America/Denver:20100216T170000 DTSTAMP:20260922T150858Z SUMMARY:Investigating the dynamics of REM sleep DESCRIPTION:Speaker: Cecilia Diniz Behn\, University of Michigan\n\nMicrodialysis and microinjection experiments suggest that neurotransmitter dynamics play an important role in the initiation and maintenance of sleep/wake states. However, the synaptic coupling in traditional population firing rate models does not explicitly incorporate the dynamics of … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100218T160000-yekaterina-epshteyn@math.utah.edu DTSTART;TZID=America/Denver:20100218T160000 DTEND;TZID=America/Denver:20100218T170000 DTSTAMP:20260922T150858Z SUMMARY:Numerical Methods for Chemotaxis Models DESCRIPTION:Speaker: Yekaterina Epshteyn\, Carnegie Mellon University\n\nIn this talk, I will first discuss several chemotaxis models including the classical Keller-Segel model. Chemotaxis is the phenomenon in which cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals (chemoattractants) in their … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100223T160000-fernando-guevara-vasquez@math.utah.edu DTSTART;TZID=America/Denver:20100223T160000 DTEND;TZID=America/Denver:20100223T170000 DTSTAMP:20260922T150858Z SUMMARY:Network based inversion DESCRIPTION:Speaker: Fernando Guevara Vasquez\n\nI present my work on network based methods to reconstruct the parameter of a differential equation inside a body from measurements taken at its surface. Two inverse problems are considered: the electric impedance tomography problem where the conductivity is to be estimated from current and voltage … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100225T160000-charles-favre@math.utah.edu DTSTART;TZID=America/Denver:20100225T160000 DTEND;TZID=America/Denver:20100225T170000 DTSTAMP:20260922T150858Z SUMMARY:Degree growth of rational maps DESCRIPTION:Speaker: Charles Favre\, École Polytechnique\n\nSuppose we are given a rational map f : P^d -> P^d on a projective space. The most basic algebraic invariant that one can attach to this map is its degree defined as the degree of the preimage of a generic hyperplane. In this talk, we shall discuss the problem of describing the behaviour of the … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100304T160000-john-r.-parker@math.utah.edu DTSTART;TZID=America/Denver:20100304T160000 DTEND;TZID=America/Denver:20100304T170000 DTSTAMP:20260922T150858Z SUMMARY:Complex hyperbolic lattices DESCRIPTION:Speaker: John R. Parker\, University of Durham\n\nA complex hyperbolic lattice is a discrete group of isometries of the unit complex ball whose quotient has finite volume (with respect to the Bergman metric). There are relatively few examples of complex hyperbolic lattices known, but these examples may be described from several different points of … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100311T160000-gunther-uhlmann@math.utah.edu DTSTART;TZID=America/Denver:20100311T160000 DTEND;TZID=America/Denver:20100311T170000 DTSTAMP:20260922T150858Z SUMMARY:30 Years of Calderón's Problem DESCRIPTION:Speaker: Gunther Uhlmann\, University of Washington\n\nIn 1980 A. P. Calderón wrote a short paper entitled "On an inverse boundary value problem". In this seminal contribution he initiated the mathematical study of the following inverse problem: Can one determine the electrical conductivity of a medium by making current and voltage measurements at the … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100318T160000-anne-thomas@math.utah.edu DTSTART;TZID=America/Denver:20100318T160000 DTEND;TZID=America/Denver:20100318T170000 DTSTAMP:20260922T150858Z SUMMARY:Lattices in exotic groups DESCRIPTION:Speaker: Anne Thomas\, University of Oxford\n\nLattices in Lie groups are well-studied, but little is known about lattices in other locally compact groups. Examples of such "exotic" groups include isometry groups of trees, polygonal complexes, and CAT(0) spaces, and Kac-Moody groups. We will survey known results, which include both rigidity and … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT BEGIN:VEVENT UID:20100408T160000-paolo-stellari@math.utah.edu DTSTART;TZID=America/Denver:20100408T160000 DTEND;TZID=America/Denver:20100408T170000 DTSTAMP:20260922T150858Z SUMMARY:Cubic fourfolds: classical problems and new perspectives DESCRIPTION:Speaker: Paolo Stellari\, University of Milano\n\nWe will review some classical constructions related to the geometry of varieties of dimension 4 described by polynomial equations of degree 3, called cubic fourfolds. The appearance of many analogies with the geometry of some varieties with trivial canonical bundle will naturally lead us to study … LOCATION:JWB 335 URL:https://www.math.utah.edu/research/colloquia/2010-spring/ END:VEVENT END:VCALENDAR