Education

• Ph.D., Department of Mathematics, University of Pennsylvania, Philadelphia, USA, 1987
  Thesis: "Some Extremal Problems for Graphs with Fixed Numbers of Vertices and Edges,"
  Advisor: Professor H.S. Wilf

• M.S. (Diploma), Mathematics, Kiev State University University, Kiev, USSR, 1975
  Thesis: "Arrangements of Some Geometrical Groups in Symmetric Groups"
  Advisors: Professors L.A. Kaluznin and M.H. Klin

Research Interests

Most of the time they are in Combinatorics, Graph Theory or Algebra.
I am interested in other topics and willing to work on any problem that I understand and like.

Service Outside the Department

I am a member of the Editorial Board of the Electronic Journal of Combinatorics .

Employment

• Visiting Professor, University of Pennsylvania, Spring, 2001 (sabbatical)
• Visiting Researcher, DIMACS, Rutgers University, Fall 2000 (sabbatical)
• Professor, Department of Mathematical Sciences, University of Delaware, since 9/1998
• Associate Professor, Department of Mathematical Sciences, University of Delaware, 9/1993-8/1998
• Visiting Researcher, RUTCOR, Rutgers University, 9-12/ 1993 (sabbatical)
• Assistant Professor, Mathematical Sciences, University of Delaware, 9/1987-8/1993
• Lecturer (part time), Haverford College, Spring 1987
• Lecturer and TA , University of Pennsylvania, 9/1980-5/1987
• Lecturer (part time), Spring Garden College of Philadelphia, 1984-1986
• Lecturer (part time), Philadelphia Community College, 1981-1982
• Actuarial Assistant, General Accident Ins.Co., 2/1982-7/1983
• Teacher of Mathematics, Mathematics and Physics Boarding High School at Kiev State University, Kiev, USSR, 1975--1979

Research Advising

• Current Ph.D. students: Alex Kodess, Brian Kronenthal.
• Dr. Bryan Petrak (Ph.D. -- 6/2012, with Dr. G. Ebert). Boeing Corp., Oklahoma City, Oklahoma.
• M.A. Thesis advisor for  Spencer Tofts (graduated in 5/2010). Currently is a Ph.D. student in Mathematics, University of Pennsylvania.
• Undergraduate Research Program for Michael Tait (Summer 2009). Currently is a Ph.D. student in Mathematics, UC San Diego.
• Undergraduate Research Program for Alison Gordon (Summer 2006). Currently is a Ph.D. student in Mathematics, University of Wisconsin.
  
• Undergraduate Research Program for Robert DeMarco (Summer 2005 -- Spring 2006). Currently is a Ph.D. student in Mathematics, Rutgers University.
• Dr. Jason Williford (Ph.D. -- 6/2004), University of Wyoming, Laramie, Wyoming.
• Dr. Vasyl Dmytrenko (Ph.D. -- 6/2004), Temple University, Philadelphia, Pennsylvania.
• Dr. Sven Reichard (Ph. D. -- 6/2003, with Dr. M.H. Klin).
• Dr. Raymond Viglione (Ph.D. -- 6/2002 ), Kean College, Union, New Jersey.
• Undergraduate Research Program and Honor Thesis (with Dr. G.L. Ebert) for   David Kravitz (graduated in 5/2000).
  Ph.D. from Carnegie-Mellon University. Dr. Kravitz   is working for the NSA. 
  
• Dr. Owen Byer (Ph.D. -- 5/1996 ), Eastern Mennonite University, Harrisonburg, Virginia.
• Undergraduate Research Program and Honor Thesis (with Dr. W. Li) for  Ryan Martin (graduated in 5/1995). Ph.D. from Rutgers University.
  Dr. Martin, Iowa State University, Ames, Iowa.
• M.S. Thesis advisor for  Alexander Schliep (graduated in 2/1994 ). Ph.D. from Max Plank Institute.
  Dr. Schliep , Rutgers University, Piscataway, New Jersey.
• Dr. Gene Fiorini , (Ph.D. -- 6/1993), DIMACS, Rutgers University, Piscataway, New Jersey.
• Undergraduate Research Program for  Samuel Stump (Summer 1992).

Teaching

University of Delaware:




Undergraduate Courses:

• Discrete Mathematics I (M210)
• Calculus with Applications (M221)
• Finite Mathematics with Applications (M230)
• Calculus I (M241), Calculus II (M242 - with Maple)
• Calculus III (M243 - in Computer Classroom with Maple)
• ODE with Applications (M302 -in Computer Classroom with Maple)
• Discrete Mathematics II (M315)
• Linear Algebra (M349) 
• Graph Theory (M389)
• Abstract Algebra (M450/M451)
• Ideas of Geometry (Summer College, Special Programs)
• Geometry (M540)
• Geometry (a special summer course for DPI Critical Curriculum Program)
• Discrete Mathematics (a special summer course for DPI Critical Curriculum Program)
• Coding Thery (M567)

• Foundations of Mathematics I, II (M567) (for Ph.D. Program in Mathematics Education)
• Abstract Algebra (M650)
• Vector Spaces (M672)
• Combinatorics I (M688)
• Combinatorics II (M689)
• Methods of Linear Algebra in Combinatorics (Thematic Seminar - M699)
• Group Theory with Applications (M845)
• Field Theory with Applications (M846)
• Asymptotic Theory of Designs (Topic Course - M867)
• Extremal Combinatorics (M885)

• Selected topics in Abstract Algebra (three different courses)
• Methods of Linear Algebra in Graph Theory
• Algebraic methods in Combinatorics
• Topics in Combinatorics and Graph Theory (five different cources)
• Extremal Graph Theory
• Probabilistic Methods in Combinatorics and Graph Theory
• Nowhere-zero flows in graphs
  University of Pennsylvania

  as Instructor:
  

  Algebra and Functions; Ideas of Mathematics and Computer; Introduction to Mathematics II; Calculus I, II, III; Advanced Calculus; Linear Algebra; Summer Enrichment Program for Gifted Children (3 different courses)

  as Teaching Assistant:
  

  Calculus I - Computer Section (Fortran), Calculus I, II - Computer Sections (Basic) Real Analysis; Ordinary Differential Equations
  Haverford College:
  Problem Solving in Pascal

  Spring Garden College of Philadelphia:
  Precalculus I, II; Calculus I, II

  Philadelphia Community College:
  Basic Arithmetic I, II; Basic Algebra and Mathematical Concepts

  Math - Physics Boarding High School at the Kiev State University:
  
  Three year special course in mathematics (included regular and advanced topics of the high-school curriculum in algebra, geometry and calculus; abstract algebra; geometric transformations); preparation of the school teams for mathematical olympiads

Invited Talks at Conferences

• DIMACS Workshop on Expanding Graphs and Applications, Princeton University, Princeton, NJ, May 11--14, 1992
• AMS meeting, Special Section on Extremal Combinatorics and Graph Theory, DeKalb, IL, May 1993;
• The International Conference ``Algebra and Combinatorics: Interactions and Applications", Konigstein, Germany, March 1994;
• The 6--th International Conference on Formal Power Series and Algebraic Combinatorics, Rutgers University, New Brunswick, NJ, May 1994;
• The The NSF/CBMS Research Conference on Eigenvalues and Combinatorics, CSU, Fresno, CA, June 1994;
• Invited Speaker at the award ceremony for The Delaware Mathematical League, Dover, DE, March 1995;
• A Combinatorics and Graph Theory Conference in Honor of Herb Wilf's 65th birthday, University of Pennsylvania, Philadelphia, Pa, June 1996;
• Workshop on Extremal Combinatorics, Mathematical Sciences Research Institute, Berkeley, November 1996;
• International Colloquium on Extremal Graph Theory, dedicated to the memory of Paul Erdos, Balatonlelle, Hungary, July 1997;
• AMS meeting, Special Section on Combinatorics and Graph Theory, Louisville, Kentucky, March 1998;
• DIMACS Research & Education Institute 1998: Graph Theory and Combinatorial Optimization, DIMACS Center, Rutgers University, Piscataway, NJ, July, 1998;
• First Annual K-12 Mega-Conference on Discrete Mathematics, DIMACS Discrete Math/Theory of Computing Seminar, DIMACS Center, Rutgers University, Piscataway, NJ, December, 1998 (two 2.5 hour workshops for high school teachers);
• Joint CMS-AMS meeting, Special Section on Extremal Combinatorics and Graph Theory, Queen's University, Kingston, Canada, December, 1998.
• AMS meeting, Special Section on Combinatorics and Graph Theory, SUNY, Buffalo, New York, April 1999.
• DIMACS Mathematics Series, AT & T, Shannon Laboratory, Florham Park, NJ, October 2000.
• AMS meeting, Special Section on Extremal Combinatorics, University of Indiana, Bloomington, Indiana, April 2003.
• AMS meeting, Special Section on Finite Geometries, University of Colorado, Boulder, Colorado, October, 2003.
• AMS meeting, Special Section on Extremal Combinatorics, Vanderbilt University, Nashville, Tennessee, June, 2004.
• AMS meeting, Special Section on Extremal Combinatorics, Northwestern University, Evanston, Illinois, October 2004.
• WaterMellon Workshop on Extremal Graph Theory, Carnegie Mellon University, Pittsburgh, Pennsylvania, May, 2005.
• AMS meeting, Special Section on Extremal and Probabilistic Combinatorics, University of Arkansas, Fayetteville, Arkansas, November, 2006.
• EXCILL: Extremal Combinatorics at Illinois, University of Illinois, Urbana-Champaign, Illinois, November, 2006.
• AMS meeting, Special Section on Algebraic and Extremal Combinatorics, Davidson College, North Caroline, March 2007.
• Workshop on Extremal Combinatorics, Alfred Renyi Institute of Mathematics, Budapest, Hungary, June 2007.
• WaterMellon Workshop on Extremal Graph Theory II, University of Waterloo, Canada, June, 2009.
• Rocky Mountain Discrete Mathematics Day, University of Colorado at Denver, Denver, Colorado, June, 2009.
• AMS Central Section meeting, Special Section on Extremal and Probabilistic Combinatorics, Macalester College, St Paul, Minnesota; April 2010.
• Spring 2010 AMS Eastern Sectional meeting, Special Section on Graph Theory, NJIT, Newark, New Jersey; May 2010.
  
• Workshop on Linear Algebra Techniques in Combinatorics and Graph Theory, Banff International Research Station, Banff, Alberta, Canada; January-February 2011.
  

Other conferences, contributed talks, colloquia, seminars, lectures

• Two talks at Mathematical Colloquium in University of Kiev, 1974--1975.
• Two talks at the Kiev High School Teachers Seminar, Kiev, 1977.
• AMS Meeting, Fairfield, CT, October, 1983.
• ICM-86, Berkeley, CA, August, 1986.
• Lecture for High School Students: ``Why Math?'', April 1986.
• Four Lecture Seminar for Elementary School Teachers, Abington, PA, October 1987.
• Conference on Probabilistic Methods in Combinatorial Optimization, Baltimore, MD, June 1987.
• RUTCOR Conference, Newark, NJ, November, 1987.
• AMS--MAA Meeting, Atlanta, GA, January, 1988; contributed talk.
• Nineteenth Southeastern International Conference on Combinatorics, Graph Theory and Computing, LSU, Baton Rouge, LA, February, 1988; contributed talk.
• Third Advanced Research Institute on Discrete Applied Mathematics, RUTCOR, New Brunswick, NJ, May, 1988.
• Lecture for general public: ``What is Mathematics?'', October 1988.
• Sixth International Conference on Graph Theory and Applications, Western Michigan University, Kalamazoo, MI, June, 1988; contributed talk.
• AMS--MAA Meeting, Phoenix, AZ, January, 1989
• Twentieth Southeastern International Conference on Combinatorics Graph Theory, Computing, FAU, Boca Raton, FL, February, 1989; contributed talk.
• A talk at the Combinatorics Seminar at George Washington University, Washington, D.C., April, 1989
• The Capital City Conference on Combinatorics and Theoretical Computer Science, The George Washington University, Washington, D.C., May, 1989; contributed talk.
• The Fourth Advanced Research Institute on Discrete Applied Mathematics, RUTCOR, New Brunswick, NJ, June, 1989; contributed talk.
• Joint Summer Research Conference on Probabilistic and Analytic Methods in Discrete Mathematics, Humbolt State University, Arcata, CA, June, 1989.
• AMS--MAA Meeting, Louisville, KY, January, 1990.
• Twenty--first Southeastern International Conference on Combinatorics, Graph Theory and Computing, FAU, Boca Raton, FL, February 1990.
• A talk at the Combinatorics Seminar at George Washington University, Washington, D.C., March 1990.
• Fifth Advanced Research Institute on Discrete Applied Mathematics, RUTCOR, New Brunswick, NJ, May, 1990; contributed talk.
• Fifth SIAM Conference on Discrete Mathematics, Atlanta, GA, August 1990; Organized (with other members of Combinatorics/Algebra Group, UD) and chaired a mini symposium on ``Irregular Networks", which took place during the conference.
• ICM--90, Kyoto, Japan, August 1990; contributed talk.
• AMS--MAA Meeting, San Francisco, CA, January 1991. Attended a two day mini course on ``Probabilistic Methods in Combinatorics", which took place before the meeting
• Winter Meeting of the EPADEL Section of the MAA, U.D., Newark, DE, January, 1991.
• Twenty--second Southeastern International Conference on Combinatorics, Graph Theory and Computing, LSU, Baton Rouge, LA, February 1991; contributed talk.
• Sixth Advanced Research Institute on Discrete Applied Mathematics, RUTCOR, New Brunswick, NJ, June, 1991; contributed talk.
• Fall Meeting of the EPADEL Section of the MAA, Drexel University, Philadelphia, PA, November, 1991.
• Twenty--third Southeastern International Conference on Combinatorics, Graph Theory and Computing, FAU, Boca Raton, FL, February 1992; contributed talk.
• Colloquium Speaker at the Department of Mathematics, George Washington University, Washington, D.C., April 1992.
• Seventh Advanced Research Institute on Discrete Applied Mathematics, RUTCOR, New Brunswick, NJ, May--June, 1992; contributed talk.
• Seventh International Conference on Graph Theory and Applications, Western Michigan University , Kalamazoo, MI, June, 1992; contributed talk.
• Sixth SIAM Conference on Discrete Mathematics, University of British Columbia, Vancouver, Canada, June, 1992; contributed talk.
• A talk at the Temple Number Theory/Combinatorics/Modular Forms Seminar, Temple University, Philadelphia, November 4, 1992.
• Holiday Symposium on Lie Group Representations and Combinatorics, Las Cruses, New Mexico, December 1992; contributed talk.
• 1993 SIAM Annual Meeting, Philadelphia, June 1993; chaired a session on Combinatorics and Graph Theory; contributed talk.
• The International Conference on Combinatorics, Paul Erd\H os is Eighty, International Conference sponsored by Janos Bolyai Mathematical Society, Keszthely, Hungary, July 1993; contributed talk.
• A talk at the Combinatorics Seminar at George Washington University, Washington, D.C., December 1993.
• Colloquium Speaker, RUTCOR, Rutgers University, December 1993.
• The Seventh SIAM Conference on Discrete Mathematics, Albuquerque, NM, June 1994; contributed talk.
• Math 301: Implementation of Standards, Teacher's conference, Ocean City, MD, November, 1994
• Eight Cumberland Conference on Graph Theory, Combinatorics and Computing, Vanderbilt University, Nashville, TN, April 1995; contributed talk.
• The 15--th British International Conference on Combinatorics, University of Stirling, Stirling, Scotland, July 1995; contributed talk.
• Colloquium Speaker, Gettysburg College, Gettysburg, PA, October 1995
• Twenty--Seventh Southeastern International Conference on Combinatorics, Graph Theory and Computing, LSU, Baton Rouge, LA, February 1996; contributed talk.
• Colloquium Speaker, Shippensburg University, Shippensburg, PA, March 1996.
• Eighth International Conference on Graph Theory, Combinatorics, Algorithms and Applications, Western Michigan University , Kalamazoo, MI, June, 1996; contributed talk.
• A talk at Combinatorics Seminar, Department of Mathematics, Tel Aviv University, Tel Aviv, Israel; January 1997.
• A talk at a joint meeting of Combinatorics Seminar and The Amitsur Algebra Seminar, Department of Mathematics, Hebrew University, Jerusalem, Israel; January 1997.
• A talk at Algebra Seminar, Department of Mathematics, Center for Teaching and Technology, Holon, Israel; January 1997.
• A talk at the Combinatorics Seminar, Department of Mathematics, Technion, Haifa, Israel; January 1997.
• A talk at Algebra Seminar, Department of Mathematics and Computer Sciences, Bar-Ilan University, Bar-Ilan, Israel; January 1997.
• Colloquium Speaker, Department of Mathematics and Computer Science, Ben-Gurion University, Beer-Sheva, Israel; January 1997.
• Twenty-Eigth Southeastern International Conference on Combinatorics, Graph Theory, Computing, FAU, Boca Raton, FL, February 1997; contributed talk.
• A talk at DIMACS Discrete Math/Theory of Computing Seminar, DIMACS Center, Rutgers University, Piscataway, NJ, February 1997.
• Colloquium Speaker, Department of Mathematics, Emory University, Atlanta, Georgia; April 1997.
• The 16--th British International Conference on Combinatorics, Queen Mary and Westfield College, London, July 1997; contributed talk.
• Fall Meeting of the EPADEL Section of the MAA, University of Pennsylvania, Philadelphia, PA, November 1997.
• Twenty-Ninth Southeastern International Conference on Combinatorics, Graph Theory, Computing, FAU, Boca Raton, FL, March 1998; contributed talk.
• Twenty-Third Australian Conference on Combinatorial Mathematics and Combinatorial Computing, University of Queensland, Brisbane, Australia; July 1998; contributed talk.
• A talk at Number Theory/Cryptology Seminar, Department of Mathematics and Computer Sciences, Macquiry University, Sydney, Australia; July 1998.
• A talk at Faculty/Student Seminar, Messiah College, Grantham, PA; December 1998.
• Colloquium Speaker, Department of Mathematics, Lehigh University, Bethlehem, PA; December 1998.
• KCC-99 (a Combinatorics Conference in Honor of D. Kleitman's 65th birthday), Department of Mathematics, MIT, Cambridge, MA; August 1999.
• A talk at Discrete Mathematics Seminar, Department of Mathematics, Princeton University, NJ; March 2000.
• The Ninth Quadrennial International Conference on Graph Theory, Combinatorics, Algorithms and Applications, June 4-9, 2000, Kalamazoo, MI, USA; contributed talk.
• The 6th International Conference on Graph Theory, August 28-September 1, 2000, Marseille, France; contributed talk.
• A talk at Discrete Mathematic Seminar, University of Memphis, Memphis, TN, October, 2000. (A five day visit.)
• Colloquium Speaker, Department of Mathematics, US Naval Academy, Annapolis, MD; April, 2001.
• A talk at Combinatorics Seminar, Cambridge University, Cambridge, UK, May, 2001. (A two week visit.)
• A talk at Discrete Mathematics Seminar, Department of Mathematics, Princeton University, NJ; December 2001.
• Colloquium Speaker, Department of Mathematics, Drexel University, Philadelphia, PA; January, 2002.
• Thirty-Third Southeastern International Conference on Combinatorics, Graph Theory, Computing, FAU, Boca Raton, FL, March 2002; contributed talk.
• A talk at Combinatorics Seminar, Microsoft Research Theory Group, Redmont, WA, May-July, 2002. (One and two week visits.)
• Mid-Atlantic Center for Mathematics Teaching and Learning Conference, Pennsylvania State University, State College, PA, June 2002.
• Geometric and Algebraic Combinatorics 2, Oisterwijk, the Netherlands, August 11-16, 2002; contributed talk.
• A talk at Discrete Mathematics Seminar, Department of Mathematics, Princeton University, NJ; April 2003.
• Extremal Combinatorics, Conference and Workshop, Renyi Institute of Mathematics, Budapest/Czopak, Hungary, June-July, 2003; contributed talks.
• Combinatorics in Cambridge (celebrating Bela Bollobas's 60th birthday), Cambridge UK, August 4-7, 2003.
• Organized (with David Fleshner) an EPADEL Conference for Undergraduates ``Careers in Mathematics", Gettysbyrg College, Gettysburg, PA; November 2003.
• A talk at Combinatorics Seminar, Department of Mathematics, University of Illinois at Chicago, IL; December 2003.
• A talk for the Mathematics Awarness Week at the University of Delaware, Newark, Delaware, April, 2004.
• A talk at Combinatorics Seminar, Department of Mathematics, University of Pennsylvania, Philadelphia, PA; December 2004.
• Colloquium Speaker, Department of Mathematics, Iowa State University, Aimes, Iowa; January, 2005.
• AMS Meeting, Special Section on Coding and Finite Geometries. University of Delaware, Newark, Delaware; April 2005.
• A talk at Tutte Seminar, Department of Combinatorics and Optimization, University of Waterloo, Waterloo, Canada; April 2005.
• AMS Meeting, Special Section on Extremal and Probabilistic Combinatorics. Bard College,  Annandale-on-Hudson, New Yourk, USA; October 2005.
• Lie Groups, Representations and Discrete Mathematics Workshop,  IAS, Princeton, New Jersey, USA; February 2006.
• Department of Combinatorics and Optimization, University of Waterloo, Waterloo, Canada;  March 2006. (A five day visit.)
• A talk at Combinatorics Seminar, Department of Mathematics, University of Pennsylvania, Philadelphia, PA;   April 2006.
• SIAM Conference on Discrete Mathematics, University of Victoria, Victoria, British Columbia, Canada; June 2006 (Co-organizer of minisimposium; contributed talk.)
  
• Colloquium Speaker, Department of Mathematics, US Naval Academy, Annapolis, MD; October, 2006.
• A talk at the Combinatorics Seminar at George Washington University, Washington, D.C.; October 2006.
• AMS meeting, Special Section on Finite Geometries, Miami University, Oxford, Ohio, March 2007.
• A talk at the Combinatorics/Geometry Seminar, Department of Mathematics, University of Colorado at Denver, Denver, Colorado, April 2007. (A four day visit.)
• Colloquium Speaker, Department of Mathematics, University of Mary Washington, Fredericksburg, VA; October, 2007.
• Colloquium Speaker, Department of Mathematics, University of Miami, Oxford, OH; October, 2007.
• Additive Combinatorics Workshop, IAS, Princeton, NJ; October-December 2007.
• Expanders in Pure and Applied Mathematics, IPAM, UCLA, CA; February 2008.
• A talk at the Combinatorics Seminar, Department of Mathematics, UCSD, La Jolla, CA; March 2008. (A two week visit.)
• A talk at the Combinatorics Seminar, Department of Mathematics, LSE, London, UK; May 2008. (A four day visit.)
• A talk at the Combinatorics Seminar, Department of Mathematics, University of Cambridge, UK; May 2008. (A week visit.)
• A lecture for high school students, Liceum #38, Kiev, Ukraine; May 2008.
• A talk at the Geometry Seminar, Department of Mathematics, University of Ghent, Ghent, Belgium; June 2008. (A two week visit.)
• Colloquium Speaker, Department of Mathematics, University of Liege, Belgium; June 2008.
• The 9th International Conference on Finite Fields and Their Applications, University College Dublin, Ireland, July 2009; contributed talk.
• Workshop on Exremal and Probabilistic Combinatorics, IPAM UCLA, CA; November 2009.
• International Conference on Designs, Codes and Geometries in Honor of Gary Ebert on the occasion of his retirement,
  University of Delaware, Lewis, Delaware; March--April 2010. (Co-organized the conference with Qing Xiang.)
• From A=B to Z=60. Conference in Honor of Doron Zeilberger's 60-th Birsday, DIMACS, Piscataway, NJ; May, 2010.
  
• A talk at the Combinatorics Seminar, Department of Mathematical Sciences, Carnegie Mellon University, Pittsburgh, PA.; November 2010.
  
• Department of Combinatorics and Optimization, University of Waterloo, Waterloo, Ontario, Canada; May 2011. (A two day visit.)
  
• Waterloo Workshop in Computer Algebra 2011, W80, Wilfried Laurier University, Waterloo, Ontario, Canada; May 2011.
  
• A talk at the Discrete Mathematics Seminar, Department of Mathematics, University of Wyoming, Laramie, Wyoming; July 2011 (a week visit).
• Colloquium Speaker, Department of Mathematics, Howard University, Washington, DC; November, 2011.
• Rocky Mountain Discrete Mathematics Day, University of Colorado at Fort Collins, Fort Collins, Colorado, May 2012; contributed talk.
• Department of Mathematics, University of Wyoming, Laramie, Wyoming; May 2012 (a four day visit).
• Department of Mathematics, UCSD, La Jolla, CA; August 2012 (a week visit.)
• Midwestern Graph Theory (MIGHTY) LIII Conference, Iowa State University, Ames, Iowa, September 2012; contributed talk.

Societies

• American Mathematical Society (AMS)
• Fellow of the Institute of Combinatorics and its Applications