GroupoidFest 2018

Department of Mathematics, University of Illinois at Chicago

November 10 and 11, 2018

GFest 2019 -- Next Year in Reno!

Chicago at Night

Thanks! To all the folks who participated in the XXIII GroupoidFest. The weather was good, the talks even better, and the performances at Chicago Symphony Center were superb!

Next year, the XXIV GroupoidFest will be held in Reno, Nevada, and honors Jean Renault on his 70th birthday! Check with Alex Kumjian for the latest developments.

The GroupoidFest was held in Chicago for the first time this Fall, on the East Campus of the University of Illinois at Chicago, situated near the heart of Chicago. This left plenty of time to enjoy some sightseeing in this great city, and dinner at one of the many excellent restaurants. Suggestions for accommodations in the city are below, along with travel information.

Location: All Talks will be held in Room 236 (note room change!) and the Teas are in the adjacent room, of the Science and Engineering Offices (SEO) building. SEO is located near the northeast corner of the intersection of Taylor and Morgan Streets. The Department of Mathematics, Statistics and Computer Science is located on floors 3—7 and 12 & 13 of SEO.

Visiting Directions to the UIC campus are available here, and an interactive map of the campus is here. A downloadable map of East Campus is here.

Schedule of Talks — Room 236 SEO — Abstracts of Talks


Saturday November 10
Name of Speaker
Title of Talk
8:30 a.m. — 9:00 a.m.
Welcome Coffee & Tea

9:00 a.m. — 9:45 a.m.
Alex Kumjian
The homology of ample groupoids and the Matui conjecture
9:45 a.m. — 10:15 a.m.
Coffee & Tea

10:30 a.m. — 11:15 a.m.
Marius Ionescu The Dixmier--Douady Classes of Certain Groupoid
$C^*$-Algebras with Continuous Trace
11:30 a.m. — 12:15 p.m.
Leonard Huang
Bundles of Generalized Fixed-Point Algebras
for Proper Groupoid Dynamical Systems
12:15 p.m. — 1:45 p.m.
1:45 p.m. — 2:30 p.m.
Constantine Medynets
On Algebraic Properties of Full Groups
2:45 p.m. — 3:30 p.m.
Olga Lukina
Non-Hausdorff groupoids and Galois groups
3:30 p.m. — 4:00 p.m.
Coffee & Tea

4:15 p.m. — 5:00 p.m.
Jeffrey Morton
Groupoidification and the Fock Pseudomonad
5:00 p.m.
Conference Party
Sunday November 11
Name of Speaker
Title of Talk
8:30 a.m. — 9:00 a.m.
Welcome Coffee & Tea

9:00 a.m. —9:45 a.m.
Valentin Deaconu
Symmetries of the $C^*$-algebra of a vector bundle
9:45 a.m. — 10:30 a.m.
Coffee & Tea

10:30 a.m. — 11:15 a.m.
Khashayar Sartipi
The Paschke Categories, K-homology, and
the Riemann-Roch Transformation
11:30 a.m. — 12:15 p.m.
Paul Muhly
Groupoid Methods in Wavelet and Fractal Analysis, Redux

Accommodations: There are hundreds of hotels, hostels and airbnb offerings in the city.

There are three choices of accomodations which are walking distance to the UIC East Campus - the first three choices listed below are within a mile of the campus.

The Halsted/UIC station on the CTA Blue Line is on the north side of the UIC East campus, and is a 10 minute walk to the SEO building. If an accomodation is close to a CTA stop, then that is a convenient way to access the campus.

Finally, there is a campus parking garage at the corner of Halsted and Taylor Streets (760 West Taylor Street) that is a 5 minute walk to the SEO building, and costs just $8/day for parking. So if you are driving, this is most convenient.

Chicago is a very large city! Be sure to check that the location of the hotel/hostel/rental is not so far from the UIC campus, by car or CTA train or bus. Ask an organizer about the location if in doubt.


Name Comments
Travelodge by Wyndham Located on East Harrison Street, about a 10-15 minute walk to the SEO building.
Crowne Plaza Located in the Chicago West Loop on Halsted Street, about a 10-15 minute walk to the SEO building.
Hostelling International Chicago Located in the heart of the Chicago Loop district on Congress Ave, about a 20 minute walk to the SEO building.
The Congress Plaza Hotel Located on Michigan Ave, 3 blocks south from the Art Institute. About a 25 minute walk to the SEO building.
Chicago Hotels
Chicago Hostels

Travel to UIC. There are lots of options, so easy in principle.

Driving: The UIC East campus was formerly known as The University of Illinois Chicago Circle, because it is located at the soutwest corner of the intersection of the Eisenhower (I290) and Kenedy/Dan Ryan Expressways (I90/94) and the combined ramps between these roads forms - a circle! Which is to say, it has reasonable easy access from these expressways. Due to construction though, some of these exit ramps are closed, so you need to get off somewhere near campus and then take Halsted or Harrison Streets to the campus. Check your GPS maps to be cautious.

Plane: Chicago has two airports, O'Hare and Midway. From either airport, a Taxi to downtown Chicago, or the UIC Campus will costs anywhere from $40 to $60, and is not even that fast.

The O'Hare Station of the CTA Blue line is located in the basement of the main terminal at O'Hare, and for $2.50 you can take the train directly to the Halsted/UIC station. The trip is between 45 minutes and possibly more than an hour, depending on the time of day.

The Midway Station of the CTA Orange line goes from Midway Airport to the Loop in downtown Chicago. There you can get off for a hotel in the Loop, or transfer to the CTA Blue line to go to the Halsted/UIC station. The fare is still $2.50 including transfer, so is one of the great bargains available in Chicago.

Bus: There is a Greyhound Bus Station on Harrision Street, almost adjacent to the Travelodge by Wyndham. The bus is a cheap and convenient way to get to UIC from Champaign/Urbana for example.

Bike: Chicago has a national reputation as one of the best large cities in the United States for bicycling. Indeed, getting around by bike is one of the big surprises when you visit Chicago, either with a rented DIVVY Bike, or with your own equipment. Plus, there are marked Bike Trails along the Lakefront and elsewhere which are spectacular and highly popular. One caution though: it sometimes seems that Biking in Chicago is a contact sport, so one really should mind the Biking Rules of the Road to stay Safe and Sound. Wouldn't want to miss any of the talks by being doored!

Restaurants:Chicago has grown into one of the top foodie cities in the world over the past 20-25 years. There are thousands of restaurant options in the city, of all types and price ranges. Some are accesible by foot from the UIC Campus — Greektown and its many restaurants on Halsted are a 10 minute walk north of campus, and there are French and Italian restaurants a 5 to 10 minute walk west on Taylor — but most require a car/taxi/Uber to get to them.

The first items on the following list are within a 10-minute walk from the SEO building, which would be convenient to visit for lunch. The other items are links to some web sites describing the many options available.


Name Comments
Student Center East The student commons has the closest places to eat to the SEO Building. On the first floor is Panda Express, Chick-fil-A and Cafe Descartes, and upstairs there is Argo Tea, Moe's Southwest Grill, Sbarro and Subway. Not the best food in Chicago, but the most convenient to SEO.
Tufano's Vernon Park Tap Located at 1073 W. Vernon Park Place, just west from the main UIC library, serves up classic Italian cuisine in an intimate restaurant setting. A 5 minute walk from the SEO building. In 2008, Tufano's received American Classics Award from the James Beard Foundation.
Tuscany Located at 1014 W. Taylor Street, serves up classic Italian cuisine in a proper restaurant setting. A 5 minute walk from the SEO building. A little pricy, but you will most likely have to take out the rest of your meal, or plan to sleep through the afternoon talks.
Thai Bowl Located at 1049 W. Taylor Street, almost across from the Tuscany restaurant. Serves up hearty Thai dishes in a bowl, what else. Basic but tasty cuisine.
Al's Italian Beef Located at 1079 W. Taylor, almost next to the Thai Bowl. A 5 minute walk from the SEO building. Get a combo Italian Beef & Sausage, plus the fries, and you are challenged to stay awake for the rest of the day. Classic Chicago food, before it all got fancified.
!DOF "I Dream of Falafel" offers fresh mediterranean cuisine. Falafels, Kebabs, Vegan options. All top quality and tasty! Located at 1129 W. Taylor, just a half block west from Al's Beef, you don't get a greater contrast.
Khaosan and Taylor Located at 1104 W. Taylor Street, a little further west than the above places. A Mom & Pop joint, with very tasty authentic Thai cuisine. Ask for a Very Hot dish, like 4/5 on their Hot Scale, and you may have to miss the afternoon talks. The Medical Center is about a mile away down Taylor Street, and they can fix you back up.
Chez Joel Bistro The tastes and aromas of France. Located at 1119 West Taylor, this is about a 10 minute walk west on Taylor Street from the SEO building. Straightforward, expertly prepared Southern French cuisine.
Artopolis Bakery/Cafe/Agora This is a gem of a place for lunch or coffee with cake. For lunch serves up very tasty Greek fare. The location at 306 S. Halsted is about a 15 minute walk north on Halsted from the SEO building, but worth the excursion!
Greek Islands America's Most Popular Greek Restaurant! Located at 200 South Halsted Street, a block north of the Artopolis Cafe. This canonical Greek restaurant does it all the old-fashioned way - heaping plates of food, and wines of Monemvassia. No one leaves hungry!
Joy-Yee Noodles Located at 1335 South Halsted Street, about a 10-15 minute walk south on Halsted from the SEO building. The walk is rewarded with a menu celebrated for it wonderful variety of Asian fusion dishes, with portions large enough to feed a graduate student for the weekend.
10 Best Restaurants There are lots of "10 Best" web sites out there - this one is from Trip Advisor. Or just try googling what you like.
50 Best Restaurants The 50 best from the Chicago Tribune Food Critic Phil Vettel. But caution - just browsing this list may cause you to change your prefered destination from Paris to Chicago!
50 Best Restaurants ZAGAT has their own opinion about what the 50 Best Restaurants are! Or rather, as they say: The people have spoken. This list is generated by customer reviews.

Organizers. Please contact either Steve Hurder or Olga Lukina if you have questions about the meeting or your plans to attend. Last updated: November 17, 2018.