Participants
Valentin   Deaconu     vdeaconu@math.unr.edu
Doug       Drinen      drinen@asu.edu
Igor       Fulman      ifulman@math.ucalgary.ca
Jiang-Hua  Lu          jhlu@math.arizona.edu
Steve      Kaliszewski kaz@math.la.asu.edu
Alex       Kumjian     alex@unr.edu
Paul       Muhly       muhly@math.uiowa.edu
David      Pask        davidp@frey.newcastle.edu.au
Alan       Paterson    mmap@olemiss.edu
John       Quigg       quigg@math.la.asu.edu
Jacqui     Ramagge     jacqui@frey.newcastle.edu.au
Nandor     Sieben      nandor.sieben@asu.edu
Jack       Spielberg   jss@math.la.asu.edu
Belisario  Ventura     bventura@wiley.csusb.edu
Alan       Weinstein   alanw@math.berkeley.edu
Dana       Williams    dana.williams@dartmouth.edu


Schedule
All talks will be held in room PSA 203 of the Math Building (Bateman Physical 
Sciences Center, A wing), which is on the northeast corner of Tyler Mall and 
Palm Walk. You can use a chalk board (sorry, no big chalk, but we do have big 
erasers!) and/or a transparency projector.

              Saturday    Sunday  
 
 9:30-10:30   Weinstein   Ramsay
10:30-11:00   Kumjian     Fulman
11:00-11:30   -break-     -break-  
11:30-12:00   Deaconu     Pask
12:00- 2:00   -lunch-     Ramagge (12:00-12:30) 
 2:00- 3:00   Paterson    -lunch- (12:30- 2:00)
 3:00- 3:30   Lu 
 3:30- 4:00   -break-
 4:00- 4:30   Drinen 
 4:30- 5:00   Sieben  
 6:00-        Tombstone Brewery


Abstracts
Deaconu: Cohomology of topological graphs and pimsner algebra

 Abstract: We use the long exact sequence of Kumjian to compute the sheaf 
cohomology of the groupoid \Gamma associated to a topological graph.  We show 
that certain twisted groupoid C*-algebras associated to \Gamma are isomorphic 
to Pimsner algebras.

Drinen: Isomorphism of graph groupoids 

 Abstract: For a row-finite directed graph E, Kumjian, Pask, and Raeburn 
defined its graph C*-algebra C*(E).  If E has no sinks, then C*(E) \cong 
C*({G}_E), where {G}_E is the graph groupoid, a construction of Kumjian, 
Pask, Raeburn, and Renault.  We investigate some graph transformations which 
preserve the graph groupoid.

Fulman: Ideals in the algebra of a one-sided dynamical system

 Abstract: We use a spectral theorem for bimodules (an analog of the theorem 
by Muhly and Solel) to describe ideals in the non-selfadjoint algebra arising 
from a one-sided dynamical system. Unlike in the case considered by Muhly and 
Solel, in our case the groupoid arising is not r-discrete.

Kumjian: C*-algebras of multigraphs

 Abstract: Building on recent work of G. Robertson & T. Steger, we consider 
certain C*-algebras associated to multigraphs.  Under mild assumptions the 
C*-algebra of a multigraph may be seen to be isomorphic to the C*-algebra of 
a groupoid associated to the multigraph.

Lu: Hopf algebras coming from groupoids

Pask: Semigroup actions on graph algebras

Paterson: Asymptotic morphisms and the analytic index map for Lie groupoids

 Abstract: We will discuss the construction of a canonical asymptotic 
morphism {T_{\epsilon}} in E(C_{0}(A(G)^{*}), C^{*}(G)) associated with a 
Lie groupoid G. When G is a trivial groupoid, this asymptotic morphism is 
the Connes-Higson asymptotic morphism.  For general G, the asymptotic 
morphism induces the analytic index map on the groupoid.

Ramsay: Local action groupoids

 Abstract: The title refers to groupoids with the property that every point 
in the space of units has a neighborhood to which the restriction of the 
groupoid is isomorphic to a groupoid arising from an action of a group on that 
neighborhood.  Most of the talk will be about results on the case in which 
the group is always the circle.  These results were obtained by El Sayed 
Sallam in his Ph.D. work, extending some results of Baum, Brylinski and 
MacPherson on delocalized cohomology to such groupoids.

Sieben: Fell bundles over inverse semigroups and r-discrete groupoids

 Abstract: Fell bundles over inverse semigroups are introduced and shown 
to be closely related to Fell bundles over r-discrete groupoids. Twisted 
semidirect product bundles are characterized as homogeneous Fell bundles. 

Weinstein: Toward normal forms for proper groupoids and Lie algebroids


Saturday Night
For Saturday night,  we have reserved space at the Tombstone Brewery so we can 
gather.  You'll be able to order your own food and drinks --- it's minimally 
organized, in keeping with my understanding of the spirit of the conference.  
The Tombstone Brewery is about 100 yards north of the Best Western, on the 
same side of the street (Scottsdale Road). From campus, this is about 1 mile 
north on Rural Road (the eastern boundary of campus), across the bridge over 
the ``river'', under the freeway bridge, and then immediately on the left.  
(When Rural Road crosses the river it becomes Scottsdale Road.)  

Address: 710 E. Gilbert.  Phone: (602) 967-2337.