Kolchin Seminar in Differential Algebra
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General Telephone: 1-212-817-7000

Academic Year 2014–2015

Alert: Please note that the regular seminar for Fall, 2014 will start at 1:00 p.m., Fridays, after lunch. Professor Alexey Ovchinnikov will be teaching a course on Differential Algebra in Rm 6417 on Fridays from 9:45 to 11:50 a.m. All KSDA afternoon meetings will be in Room 5382 of the Graduate Center. Formal sessions begin at 1:00 p.m. and last till 2:30 p.m. Most (informal) late afternoon sessions begin at 3:00 pm and are unannounced. Occasionally, we may schedule formal talks at late afternoon sessions or on Saturdays at Hunter College, Room E920, and these will be announced. Cancellation due to inclement weather will follow CUNY guideline and policy and will be posted accordingly.

Last updated on August 26, 2014. For Schedules, lecture notes and additional material, see under (or click):
 • Current Schedule   •  Past Lectures–Fall 2014  •  Past Years

Friday, September 5, 2014, 1:00 –2:30 p.m. Room 5382

Richard Churchill, Graduate Center and Hunter College, CUNY
Kolchin's Proof that Differential Galois Groups are Algebraic

Kolchin's 1948 proof that differential Galois groups are algebraic appeals to a formulation of algebraic geometry which is no longer in fashion. Modern proofs require considerable knowledge of the Grothendieck approach to that subject, which takes considerable time to digest. In this talk I hope to convince those attending that Kolchin's proof can be understood in contemporary terms with only minor appeals to algebraic geometry, i.e. the definition of an algebraic set and the Hilbert Basis Theorem.

Friday, September 12, 2014, 1:00 –2:30 p.m. Room 5382

James Freitag, University of California at Berkeley

Friday, September 12, 2014, 3:00 –4:30 p.m. Room 5382

Omar Leon Sanchez, McMaster University

Friday, September 19, 2014, 1:00 –2:30 p.m. Room 5382

Ronnie Nagloo, Graduate Center of CUNY

Friday, October 17, 2014, 1:00 –2:30 p.m. Room 5382

William Keigher, Rutgers University at Newark

Friday, October 24, 2014, 1:00 –2:30 p.m. Room 5382

Li Guo, Rutgers University at Newark

Friday, October 31, 2014, 1:00 –2:30 p.m. Room 5382

Anand Pillay, University of Notre Dame

Friday, November 7, 2014, 1:00 –2:30 p.m. Room 5382

Michael Singer, North Carolina State University

Friday, November 14, 2014, 1:00 –2:30 p.m. Room 5382

Uma Iyer, Bronx Community College, CUNY

Friday, November 14, 2014, 3:00 –4:30 p.m. Room 5382

Rahim Moosa, University of Waterloo

Saturday, November 15, 2014, 1:00 –2:30 p.m. Room and Venue, TBA

Andrei Minchenko, Weizmann Institute

Friday, December 5, 2014, 1:00 –2:30 p.m. Room 5382

Carlos Arreche, North Carolina State University

Friday, December 12, 2014, 1:00 –2:30 p.m. Room 5382

Wei Li, KLMM, Chinese Academy of Sciences, and University of California at Berkeley,

Kolchin Seminar in Differential Algebra. For 2014 Fall Semester, KSDA meets most Fridays from 1:00 PM to 2:30 PM at the Graduate Center. The purpose of these meetings is to introduce the audience to differential algebra. The lectures will be suitable for graduate students and faculty and will often include open problems. Presentations will be made by visiting scholars, local faculty, and graduate students.

Kolchin Afternoon Seminar in Differential Algebra.This informal discussion series began during the Spring Semester of 2009 and will be continued. Occasionally, for various reasons, we may also schedule guest speakers in the afternoon. It normally goes from 3:00–5:00 pm (please check with organizers). All are welcome.

Unless the contrary is indicated, all meetings will be in Room 5382. This room may be difficult to find; please read the following directions. When you exit the elevator on the 5th floor, there will be doors both to your left and to your right. Go through the doors where you see the computer monitors, then turn left and then immediately right through two glass doors. At the end of the corridor, go past another set of glass doors and continue into the short corridor directly in front of you. Room 5382 is the last room on your right.

Security. When you go to the GC you will have to sign in, and it is required that you have some photo ID with you. For directions to the Graduate Center, please click here, and for more on security requirements for entering the premise, please click here (updated September 1, 2013).

Occasionally, we also meet on a Saturday at Hunter College, Room E920. Hunter College is on 68th Street and Lexington Avenue, where the No. 4,5,6 subways stop. You need to enter from the West Building (a photo ID is required), go up the escalators to the third floor, walk across the bridge over Lexington Avenue to the East Building, and take the elevator before the Library to the 9th floor. Room 920 is located in a north-east corner.

Past Lectures, Fall 2014

Other Academic Years

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