Midwest Topology Seminar
October 23, 1999
Purdue University Calumet
Hammond, Indiana


All talks will be held in Gyte 158.

9:30 amCoffee, doughnuts, bagels, and juice (in Gyte 158)

10:00 amPo Hu
(University of Chicago)
On the Picard group of the A1-stable homotopy category

11:30 amKent Orr
(Indiana University)
Knot concordance, Whitney towers and L2 signatures

12:30 pmLunch (in Alumni Hall)

2:30 pmWojciech Chacholski
(Yale University)
Complication of spaces

4:00 pmNick Kuhn
(University of Virginia)
The cohomology of iterated loop spaces and a simple proof of Schwartz's nonrealization theorem

Note: Hammond, Indiana is in the same time zone as Chicago and observes Central Daylight Savings Time.

Directions to Purdue Calumet

The most convenient way to get to Purdue Calumet is by car. From all points, proceed to Interstate 80/94, exit 2 in Indiana, Indianapolis Boulevard, roughly 2 miles from the Illinois state line. Note that this is NOT the Indiana Toll Road! Take the northbound exit to Indianapolis Boulevard, and proceed to the stoplight at 169th Street. Turn right, and at the next stoplight, right again into the Purdue Calumet north parking lot. Proceeding straight ahead, park anywhere not obviously prohibited. The building straight ahead as you enter the parking lot, with the obnoxious flashing sign above the door, is Gyte, where all talks will be held. Both a regional map of local interstates and a campus map are available online.

If you travel by plane, Tri-State Coach offers bus service from both Midway and O'Hare airports to the Hammond/Highland terminal. Consult their web page at for a current schedule. It is best to have someone meet you at the bus terminal if you are travelling this way, so please contact one of the organizers.

Local accomodations

There are several hotels and motels available for local accomodations.

Courtyard by Marriott 7730 Corinne Drive, Hammond, IN (219) 845-6350
Fairfield Inn by Marriott 7720 Corinne Drive, Hammond, IN (219) 845-6950
Motel 6 3840 179th Street, Hammond, IN (219) 845-0330
Super 8 Motel 3844 179th Street, Hammond, IN (219) 844-8888

Mathematics Department
Purdue University Calumet
Contact the organizers