Welcome to the Research Page of William Sit
Professor Emeritus
Department of Mathematics
The City College of The City University of New York
160 Convent Avenue, New York, NY 10031
Office: R6/291D (North Academic Center)
Office Tel: 212-650-5179
Office Fax: 212-862-0004
Email: wsit@ccny.cuny.edu
 

Home Page: wsit.ccny.cuny.edu  Last Updated on: January 31, 2016


Home          Research Area          Research Works          Invited Talks
Participating Talks          Conferences Organized


Lectures: Invited Talks
  1. Tentative title, On Progress with Rota's Problem for Linear Operators in Associative Algebras, post ICIAM 2015 seminar at KLMM, Chinese Academy of Sciences, Beijing, scheduled for August 17, 2015.
  2. Revisiting Term-Rewriting Systems, at ICIAM 2015 minisymposium on Triangular decomposition of polynomial systems: solvers and applications, August 10–14, 2015, Beijing.
  3. On Rota's Problem, Differential Type and Rota-Baxter Type Algebras, at the Special Session on Gröbner Bases and Computer Algebra, at the 2014 CMS Summer Meeting, Winnipeg, June 6–9.
  4. Applications in Computer Algebra, Special Session: Algebraic and Algorithmic Aspects of Differential and Integral Operators (AADIOS), 2009 and 2014.
  5. Symbolic Computation For Fun, Education, and Research, at Conference on Axiom, City College of New York, NY., April 22, 2005.
  6. Invited speaker at Symbolic Computational Algebra, London, Ontario, Canada, July 15–19, 2002.
  7. Five lectures on Differential Algebra, Advanced Summer Workshop, Mathematics Mechanization Research Center, Chinese Academy of Sciences, Beijing, July 18–28, 2000.
  8. Differential Polynomial Algebra, International Workshop on Differential Algebra and Related Topics, Rutgers University at Newark, November 2, 2000.
  9. On Initial Value Problems for Differential Algebraic Equations, at Workshop on Symbolic Computation. Mathematical Science Research Institute, Berkeley, October 12–16, 1998.
  10. Minicourse: Differential Ideal Theory, at the Joint Workshop on Symbolic Computation and Foundation of Computational Mathematics, Mathematical Science Research Institute, Berkeley, August 17–26, 1998
  11. On Initial Value Problems for Differential Algebraic Equations, Fourth International IMACS Conference on Applications of Computer Algebra, Prague, Czech Republic, August 9–11, 1998
  12. Computations on Quasi-Algebraic Sets. Fourth International IMACS Conference on Applications of Computer Algebra, Prague, Czech Republic, August 9–11, 1998
  13. Math Magic and Fun, CUNY Math Club, April 24, 1998
  14. Quadratic Programming?, CCNY Math Club, November 20, 1997
  15. Differential Algebra and Symbolic Computations, Stuyvesant High School, March 5, 1997 (Faculty Speaker Program)
  16. First Integrals of Dynamical Systems, Third International Workshop on New Computer Technology in Control Systems (NCTCS-96), Pereslavl-Zalesky, Russia, July 29– August 2, 1996
  17. Combinatorics in Symbolic Computation, C. Sc. seminar, Graduate Center, CUNY, October, 1996
  18. First Integrals and Addition Schemes, American Mathematical Society Regional Meeting in New York, Special Session on Differential Algebra, Courant Institute of Mathematics, April 1996
  19. Parametric Linear Equations, University of Delaware, April, 1995.
  20. First Integrals of Dynamical Systems, CIRM, 1994.
  21. Mathematica Notebooks for a Conventional Differential Equations Course, A Workshop on New Technology for Symbolic Computational Mathematics and Applications in Research and Education, CAIP Center, Rutgers University, June 6–10, 1994
  22. On Differentially Homogeneous Differential Polynomials, Department of Mathematics, Columbia University, Mini-Conference on Differential Algebra, March 7–8, 1992
  23. On Parametric Linear Equations, Department of Mathematics, University of British Columbia, August 8, 1991
  24. Closedness of Morphisms in Differential Algebraic Sets, Applications to System Theory, a report on the work of S. Diop, Department of Mathematics, Columbia University, as part of Differential Algebra Seminar, Fall, 1991
  25. Computer Demo: Goldman's Algorithm for first integrals of non- linear systems, Workshop on Symbolic Computation Methods in Differential Equations, Institute for Mathematics and its Applications, University of Minnesota, June 26–30, 1989
  26. Algorithms for Parametric Systems: Linear, Algebraic, and First Order Autonomous systems, Department of Mathematics, University of Catania, Italy, June 15, 1989
  27. Initial Sets and Hilbert Polynomials, with applications to algebraic geometry and differential algebra, Department of Mathematics, University of Catania, Italy, June 8, 1989
  28. On Goldman's Algorithm for Solving First Order Multinomial Autonomous Systems, Differential Algebra Special Year at Rutgers University, December 1987
  29. Polynomials That Count Lattice Points, Discrete Geometry Seminar, Courant Institute of Mathematical Science, February 1982
  30. How Computers Play Games, Departmentof Mathematics, SUNY at Purchase, November 1979
  31. How Computers Play Games, (as part of CCNY School and Community Science Lecture Program, 1982–1984) at:
    • Junior High School 45
    • Forest Hills High School
    • Seward Park High School
    • Satellite Academie
  32. Deterministic Scheduling, Stuyvesant High School, June 1984


Lectures: Participating Talks
  1. Basics of Dimension in Differential Algebra, at Kolchin Seminar in Differential Algebra, CUNY Graduate Center, Feb 22, 2013.
  2. Anamoly of Intersection in Differential Algebra, at Kolchin Seminar in Differential Algebra, CUNY Graduate Center, Feb 10, 2012.
  3. Differential Algebraic Subgroups of SL(2), I \& II, at Kolchin Seminar in Differential Algebra, CUNY Graduate Center, Nov 19 and Dec 17, 2010.
  4. Algebraic Constraints on Initial Values of Differential equations, at Kolchin Seminar in Differential Algebra, CUNY Graduate Center, May 8, 2009.s
  5. Enumeration of Rota-Baxter and differential Rota-Baxter Words, I and II, at Kolchin Seminar in Differential Algebra, CUNY Graduate Center, March 7, 2007 and Feb 29. 2008.
  6. Computations and Some Open Problems, at Kolchin Seminar in Differential Algebra, CUNY Graduate Center, April 28, 2006.
  7. Introduction to Computational Differential Algebra, I \& II, at Kolchin Seminar in Differential Algebra, CUNY Graduate Center,Fall, 2005.
  8. Recent Results in Decomposition of Radical Differential Ideals, Kolchin Seminar in Differential Algebra, November 18, 2001
  9. Practical Computations for Quasi-Algebraic Sets, Kolchin Seminar in Differential Algebra, February 17, 2001.
  10. Symmetries of Differential Equations, Kolchin Seminar in Differential Algebra, March 11, April 15, and May 21, 2000.
  11. On Initial Value Problems of Differential Algebraic Systems, Kolchin Seminar in Differential Algebra, May 9, 1999
  12. Computations on Quasi-Algebraic Sets and Prolongations, Kolchin Seminar in Differential Algebra, September 19, 1998.
  13. (Poster presentation) International Symposium on Symbolic and Algebraic Computation, ISSAC 1998, Rostock, Germany, August 13–15, 1998
  14. Worldwide Mathematica Conference, Chicago, June 18–21, 1998
  15. (Poster presentation) East Coast Computer Algebra Day, Naval Academy at Annapolis, April 1998
  16. East Coast Computer Algebra Day, IBM Research, Thomas J. Watson Research Center, Yorktown Heights, April 1996
  17. Third International Workshop on New Computer Technology in Control Systems (NCTCS-96), Pereslavl-Zalesky, Russia, July 29–August 2, 1996
  18. International Symposium on Symbolic and Algebraic Computation, Zurich, Switzerland, July 24–26, 1996
  19. East Coast Computer Algebra Day, IBM Research, Thomas J. Watson Research Center, Yorktown Heights, April 1996
  20. American Mathematical Society Regional Meeting in New York, Special Session on Differential Algebra, Courant Institute of Mathematics, April 1996
  21. A Workshop on New Technology for Symbolic Computational Mathematics and Applications in Research and Education, CAIP Center, Rutgers University, June 6–10, 1994
  22. Interactive Mathematics Text Project: MathKit for Windows Workshop, Seattle Central Community College (Seattle, WA), July 12–17, 1993.
  23. Mathematica Workshop, Vanderbilt University (Nashville, TN), June 6–11, 1993.
  24. Mid-Atlantic Algebra Conference: George Mason University, Fairfax, Virginia, May 20–23, 1992
  25. International Symposium on Symbolic and Algebraic Computation, Bonn, Germany, July 15–17, 1991


Conferences Organized and Other Activities
  1. Program Committee for the 6th International Workshop series, Differential Algebra and Related Topics (DART VI), August 10–14, 2015.
  2. Doctoral Defense Exam Committee member for Monica Aggarwal, Department of Mathematics, Rutgers University at Newark, April 23, 2014.
  3. Co-Guest-Editor of Special Issues in Mathematics in Computer Science, Vol. 4(2,3), September 2010, Proceedings to Applications in Computer Algebra, Special Session: Algebraic and Algorithmic Aspects of Differential and Integral Operators (AADIOS), held in Montreal, Canada, June, 2009, 256 pp.
  4. Organized an International Conference on Differential Algebra and Related Computer Algebra, in Memory of Giuseppa Carr\`{a}-Ferro, March 2628, 2008, University of Catania, Italy, and co-edited its Program and Abstracts, published as Le Matematiche, Vol. LXVIII (2008), Fasc. I, Universit\`{a} Degli Studi di Catania, Catania, 101 pp.
  5. Program Committee and advisor for International Workshop series, Differential Algebra and Related Topics} (DART), 2007, 2008, 2010, 2013.
  6. Program Committee Co-chair with Ziming Li for Asian Symposium on Computer Mathematics (ASCM), in Beijing, October 23–25, 2003.
  7. Co-editor with Ziming Li for Proceedings of Asian Symposium on Computer Mathematics (ASCM), to be published April, 2003 by World Scientific, Singapore.
  8. Advisory Committee member for East Coast Computer Algebra Day, 2003–2005.
  9. Organizer and Chair with Prof. Jerry Ianni, and poster presenter: East Coast Computer Algebra Day, May 18, 2002, held at LaGuardia Community College.
  10. Program Committee member for International Symposium on Symbolic and Algebraic Computation (ISSAC), held at University of Western Ontario, July 22–25, 2001.
  11. Co-organizer of, and speaker at, the International Workshop on Differential Algebra and Related Topics, Rutgers University at Newark, November 2–3, 2000.
  12. Co-organizer of, and speaker at, the AMS Special Session on Differential Algebra and Related Topics, Columbia University, November 4–5, 2000.
  13. Co-editor of Proceedings: International Workshop on Differential Algebra and Related Topics, in Summer, 2002. World Scientific, Singapore, 2002, viii+305 pp.
  14. Co-Guest Editor for Special Issue on Differential Algebra and Differential Equations, Journal of Symbolic Computation, Volume 28 (4, 5), 1999.
  15. International Symposium on Symbolic and Algebraic Computation, Simon Fraser University, Vancouver, Canada, August 28–31, 1999.
  16. Workshop on Symbolic Computation. Mathematical Science Research Institute, Berkeley, October 12–16, 1998.v
  17. Joint Workshop on Symbolic Computation and Foundation of Computational Mathematics, Mathematical Science Research Institute, Berkeley, August 17–26, 1998
  18. Fourth International IMACS Conference on Applications of Computer Algebra, Prague, Czech Republic, August 9–11, 1998
  19. Seminar on Computational Group Theory, City College Department of Mathematics, Fall 1990–1991
  20. Computer Algebra Seminar, Courant Institute of Mathematics, Fall 1989 –1991
  21. Differential Algebra Seminar at Columbia University, 1987–1995
  22. Computers and the Teaching of Mathematics, a Training Program for Professors of Mathematics, at Dartmouth College, sponsored by the Sloan Foundation, June 19–27, 1990
  23. Workshop on Symbolic Computation Methods in Differential Equations, Institute for Mathematics and its Applications, University of Minnesota, June 26–30, 1989
  24. First International Joint Conference: International Symposium on Symbolic and Algebraic Computation, and 6-th International Conference on Applied Algebra, Algebraic Algorithms and Error Correcting Codes, at the University La Sapienza, Rome, Italy, July 4–8, 1988
  25. Differential Algebra Special Year at Rutgers University, 1987–88


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