International conference on geometric and combinatorial methods in group theory and semigroup theory.

May 17 to May 21, 2009

The aim of this conference is to stimulate cooperative research among group theorists and semigroup theorists who are using related techniques. Research talks will involve applications of geometric methods, combinatorial methods, dynamical methods, algorithmic properties, or asymptotic properties to groups or semigroups.

This conference is also a recognition of the research contributions of John Meakin, as well as his contributions to his students and postdoctoral mentees.


A Proceedings of the International Conference on Geometric and Combinatorial Methods in Group Theory and Semigroup Theory (ICGS2009) will be published in a special issue of the International Journal of Algebra and Computation (IJAC). All ICGS2009 participants are kindly invited to submit a paper by December 31, 2009.

Submissions should be sent by email to the conference email account, The papers will be edited/refereed in accordance with the usual standards of IJAC.

In order to help with planning, please let the organizers know of your intention to submit a paper by emailing with the approximate number of pages of the paper by August 31. This will help us to plan with the publishers for the amount of pages expected for the special issue devoted to ICGS2009.

Conference photo

The conference photo can be viewed here.

Schedule and abstracts

The conference talks will begin at 8:50am on Sunday, May 17th and end at 6:00pm on Thursday, May 21. PDF files of the complete schedule and the daily schedule of all acitivities are available.

The abstracts of the conference talks are available in a PDF abstract booklet.

The conference will be held in Avery Hall on the main (city) campus of UNL (links to maps are provided under "Travel" below).

Registration and support

The on-line registration form is now available. The deadline for completing this form is May 1, 2009; we ask that you fill in the form sooner, if possible, to aid our planning. If you have more information or changes to make to your registration later, you can let us know by completing the registration update form, using the email address and password from your first registration.

The registration fee for the conference will be $50 for faculty and $20 for postdoctoral researchers and graduate students, to be paid (in cash or by check on a U.S. bank) on site upon arrival.

We would particularly like to encourage participation by graduate students, young researchers, and members of under-represented groups. We encourage members of these groups to apply for partial funding toward local expenses when registering by completing the support portion of the registration form by March 17, 2009.

Participants and talk submission

Researchers wishing to give a talk at the conference should submit their talk title and abstract on the on-line abstract submission page. If you have already been invited to give a talk, please submit your abstract by April 8, 2009. Otherwise, if you wish to submit a talk for consideration, you need to complete the abstract submission page by March 17, 2009.

A tentative list of participants is available.


Blocks of rooms are available at a reduced rate at the Suburban Extended Stay, the Holiday Inn (use group booking code ICG for the Holiday Inn conference rate), and the Embassy Suites, for the nights of May 16 - May 21 (checking out on the 22nd). The room rate will be $50/night at the Suburban Extended Stay, $89/night at the Holiday Inn, and $119/night at the Embassy Suites. All three hotels are within walking distance of the Mathematics Department and the conference lecture rooms in Avery Hall on the UNL campus (5 minutes' walk from the Embassy Suites, 10 minutes's walk from the Holiday Inn, and 10-15 minutes' walk from the Suburban).

Participants wishing to make reservations will need to call their hotel directly to book their room by April 21 be sure to mention the UNL Math Conference when making the reservation in order to get the conference rate. The phone numbers are: Suburban Extended Stay at (800) 475-3111 or (402) 475-3000, the Holiday Inn at (402) 475-4011, and the Embassy Suites at 402-474-1111 or (800)EMBASSY.

For other options see Local Hotels.

Most hotel rooms have two double or queen beds. Participants wishing to save money by sharing a hotel room are requested to make their own arrangements. The list of participants may be helpful for those wishing to find a roommate.


General information for visitors to Lincoln.

Maps of campus and Lincoln.

Taxi services in Lincoln are Capital Cab 402-477-6074 and Yellow Cab 402-477-4111.

If you wish to park a car on campus, you can use the Stadium parking garage. This will be free on Sunday, May, 17 and will cost $5 per day for the other days of the conference.


The conference banquet will be held on the evening of Tuesday, May 19, 2009 at the Cornhusker hotel. If you wish to attend the banquet, mark the appropriate box on the registration form. The banquet will be a buffet, with a menu including vegetarian options. There is no additional cost for the banquet for registered participants. The charge to other guests for the banquet will be $25 per guest (to be paid in cash or by U.S. check upon arrival at the conference).


Lincoln weather information.

The weather in Lincoln in May can be quite variable. Most likely it will be very pleasant (high temperatures about 70F, lows about 40-50F), but the standard deviation is high, so be prepared for a variety of interesting weather conditions. The conference organizers take no responsibility for the weather, but we will (as at previous conferences) include time for a tornado in the conference schedule.

Contact Information

ICGS 2009
University of Nebraska-Lincoln Department of Mathematics
203 Avery Hall 880130 Lincoln NE 68588-0130
Voice 402-472-3731
Fax 402-472-8466

Organizing Committee


The ICGS2009 conference is supported by funding from the National Science Foundation, the UNL Office of the Vice Chancellor for Research, the UNL College of Arts and Sciences, and the Department of Mathematics at the University of Nebraska at Lincoln.