Amorphic association schemes and fusing pairs, University of Primorska. Koper, Slovenia, July 8, 2024.
Amorphic association schemes and fusing pairs, Combinatorial Constructions Conference. Dubrovnik, Croatia, April 8, 2024.
Association schemes with many fusions, 10th Slovenian International Conference on Graph Theory, Kranjska Gora, Slovenia, June 19, 2023,
Pseudo-geometric strongly regular graphs with a regular point, 10th PhD Summer School in Discrete Mathematics, Rogla, Slovenia, June 28, 2022.
Pseudo-geometric strongly regular graphs with a regular point, 6th Xi'an International Workshop on Graph Theory and Combinatorics, Northwestern Polytechnical University, Xi'an, China (online), June 23, 2022.
Unit gain graphs with two eigenvalues and lines in complex space with few angles, 43rd Australasian Combinatorics Conference, The University of Melbourne, Australia (online), December 13, 2021.
Unit gain graphs and systems of lines in complex space with few angles, University of Amsterdam, November 10, 2021.
Unit gain graphs with two distinct eigenvalues and systems of lines in complex space, Workshop on Algebraic Graph Theory and Quantum Information, Toronto, Canada (online), August 26, 2021.
Unit gain graphs with two distinct eigenvalues and systems of lines in complex space, Combinatorial Designs and Codes, Rijeka, Croatia (online), July 12, 2021.
Several adjacency matrices for digraphs and their spectra, The 5th Xi'an International Workshop on Graph Theory and Combinatorics, Xi'an, China (online), June 29, 2021.
Several adjacency matrices for digraphs and their spectra, 11th Conference on Graph Theory and Algebraic Combinatorics, Urmia, Iran (online), March 4, 2021.
Several adjacency matrices for digraphs and their spectra, 4th Workshop on Algebraic Graph Theory and its Applications, Novosibirsk, Russia (online), March 1, 2021.
Applications of semidefinite programming, symmetry, and algebra to graph partitioning problems, International Conference on Graphs and Groups, Representations and Relations, Novosibirsk, Russia, August 12 (part 1) and 14 (part 2), 2018.
Applications of semidefinite programming, symmetry, and algebra to graph partitioning problems, Conference in Algebraic Graph Theory (Symmetry vs. Regularity), Pilsen, Czech Republic, July 4, 2018.
Eigenvalues and distance-regularity of graphs, Alpen-Adria University Klagenfurt, Austria, April 23, 2018.
Strongly walk-regular graphs and digraphs, Combined algebraic combinatorics seminar, Anhui University and University of Science and Technology of China, Hefei, China, December 2, 2017.
Partially metric association schemes with a multiplicity three, International Workshop on Bannai-Ito Theory, Hangzhou, China, November 26, 2017.
Almost distance-regular graphs and walk-regularity, Shanghai University, China, November 22, 2017.
Eigenvalues and distance-regularity of graphs, University of Shanghai for Science and Technology, China, November 21, 2017.
Partially metric association schemes with a small multiplicity, Algebraic and Extremal Graph Theory, Newark, Delaware, U.S., August 7, 2017.
A generalization of strongly regular graphs and digraphs, Eindhoven University of Technology, June 22, 2016.
Strongly walk-regular graphs and digraphs, Japanese Conference on Combinatorics and its Applications 2016, Kyoto, Japan, May 22, 2016.
Directed strongly walk-regular graphs and their eigenvalues, Eight Slovenian International Conference on Graph Theory, Kranjska Gora, Slovenia, June 24, 2015.
Eigenvalues and distance-regularity of graphs, IPM-Isfahan public lecture, Isfahan, Iran, May 5, 2015.
Almost distance-regular graphs and walk-regularity, IPM Combinatorics and Computing Conference 2015, Tehran, Iran, April 29, 2015.
Eigenvalues and distance-regularity of graphs, Mathematics Colloquium, Utrecht University, November 13, 2014.
Almost distance-regular graphs and walk-regularity, Algebraic Combinatorics: Spectral Graph Theory, Erdös-Ko-Rado Theorems and Quantum Information Theory, Waterloo, Canada, June 24, 2014.
Graphs with many valencies and few eigenvalues, Conference on Graph Theory, Matrix Theory and Interactions, Kingston, Canada, June 20, 2014.
Spectral characterizations of distance-regularity of graphs, Modern Trends in Algebraic Graph Theory, Villanova, U.S., June 2, 2014.
Eigenvalues and distance-regularity of graphs, LMS Symposium Graph Theory and Interactions, Durham, England, July 20, 2013.
An odd talk on odd graphs, odd cycles, and odd polynomials, Seventh Slovenian International Conference on Graph Theory, Bled, Slovenia, June 20, 2011.
Cometric Q-antipodal association schemes - uniformity and linked systems, Eindhoven University of Technology, March 3, 2011.
Eigenvalues, polynomials, and structure in graphs, University of Waterloo, Canada, July 30, 2010.
Cometric Q-antipodal association schemes - uniformity and linked systems, International Conference on Algebraic and Geometric Combinatorics, Gyeongju, Korea, July 16, 2010.
In memory of Dima Fon-Der-Flaass, International Conference on Algebraic and Geometric Combinatorics, Gyeongju, Korea, July 13, 2010.
Eigenvalues and structure in graphs, Discrete Mathematics Day, Worcester, U.S., May 23, 2010.
Cometric Q-antipodal association schemes - uniformity and linked systems, Ghent University, Belgium, November 13, 2009.
Almost distance-regular graphs, AMS meeting, Worcester, U.S., April 25, 2009.
Amorphic association schemes, University of Delaware, Newark, U.S., April 23, 2009.
Amorphic association schemes, Queen's University, Kingston, Canada, May 15, 2008.
Maximin Latin hypercube designs, SIAM Conference on Optimization, Boston, U.S., May 10, 2008.
Amorphic association schemes, Fourth Korea-Japan Workshop on Algebra and Combinatorics, Pohang, Korea, February 2, 2008.
Bipartite four-class association schemes and related designs, Sixth Slovenian International Conference on Graph Theory, Bled, Slovenia, June 26, 2007.
Equidistant Latin hypercube designs, Algebraic Combinatorics - An international conference, Sendai, Japan, June 27, 2006.
Eigenvalues and the structure of graphs, Delft University of Technology, The Netherlands, May 16, 2006.
Spectral characterizations of distance-regular graphs, Workshop on Graph Spectra, Aveiro, Portugal, April 11, 2006.
A new family of distance-regular graphs with unbounded diameter, Ghent University, Belgium, December 9, 2005.
Cospectral graphs of distance-regular graphs, and new distance-regular graphs, Symposium in honour of Prof.dr. J.H. van Lint, Veldhoven, The Netherlands, October 4, 2005.
Maximin Latin hypercube designs in two dimensions, SIAM Conference on Optimization, Stockholm, Sweden, May 18, 2005.
A new family of distance-regular graphs with unbounded diameter, Eindhoven University of Technology, The Netherlands, December 15, 2004.
Spectral characterizations of graphs, International workshop on distance-regular graphs and finite geometry, Pusan, Korea, July 25, 2004.
Maximin Latin hypercube designs in two dimensions, International Conference on Association Schemes, Codes and Designs, Pusan, Korea, July 21, 2004.
Combinatorial designs with two singular values, Fifth Slovenian International Conference on Graph Theory, Bled, Slovenia, June 23, 2003.
The combinatorics of Dom de Caen, International Conference on Geometric and Algebraic Combinatorics 2, Oisterwijk, The Netherlands, August 12, 2002.
Strongly regular decompositions of the complete graph, Eindhoven University of Technology, The Netherlands, March 27, 2002.
Edge-decompositions of the complete graph into strongly regular graphs, EuroWorkshop on Algebraic Graph Theory, Edinburgh, Scotland, July 9, 2001.
A spectral characterization of generalized polygons, Fourth Isle of Thorns Conference, Chelwood Gate, England, July 18, 2000.
Spectral characterizations of some distance-regular graphs, International Conference on Association Schemes, Codes and Designs, Pohang, Korea, July 4, 2000.
Amorphic association schemes, EIDMA Lustrum Congres, Mierlo, The Netherlands, October 7, 1999.
Association schemes from affine spaces, International Conference on Geometric and Algebraic Combinatorics, Oisterwijk, The Netherlands, August 19, 1999.
Fissions of classical self-dual association schemes, Seventeenth British Combinatorial Conference, Canterbury, England, July 12, 1999.
A Cauchy-Khinchin matrix inequality, Michigan Technological University, Houghton, U.S., June 12, 1998.
Association schemes related to Kasami codes and Kerdock sets, Colorado State University, Fort Collins, U.S., April 24, 1998.
A Cauchy-Khinchin matrix inequality, University of Wyoming, Laramie, U.S., April 23, 1998.
A nonregular analogue of conference graphs, Twenty-Ninth Southeastern International Conference on Combinatorics, Graph Theory and Computing, Boca Raton, Florida, U.S., March 12, 1998.
Decomposing the complete graph into three strongly regular graphs, University of Waterloo, Canada, February 19, 1998.
Graphs with few eigenvalues, Queen's University, Kingston, Canada, November 7, 1997.
Nonregular graphs with three eigenvalues, Third International Conference Finite Geometry and Combinatorics, Deinze, Belgium, May 19, 1997.
Association schemes and graphs with few eigenvalues, University of Ghent, Belgium, January 17, 1997.
Graphs with few eigenvalues, University of Waterloo, Canada, July 18, 1996.
Graphs with few eigenvalues, University of Winnipeg, Canada, June 28, 1996.
Graphs with few eigenvalues, Conference of the American, Belgian and Dutch mathematical societies, Antwerp, Belgium, May 24, 1996.
Graphs with few distinct eigenvalues, bounds on subsets and association schemes, 19th Discrete Day, Amsterdam, The Netherlands, November 17, 1995.
Graphs with constant mu and mu-bar, Third Slovenian International Conference in Graph Theory, Bled, Slovenia, June 29, 1995.
Graphs with constant mu and mu-bar, Eindhoven University of Technology, The Netherlands, May 10, 1995.
Eigenvalues and the diameter of graphs, Conference on Algebraic Graph Theory, Edinburgh, Scotland, July 12,1993.
Eigenvalues and the diameter of graphs, Eindhoven University of Technology, The Netherlands, June 16, 1993.
Classification of spreads of PG(3,4)\PG(3,2), Centre for Mathematics and Computer Science (CWI), Amsterdam, The Netherlands, May 14, 1992.
Sets of mutually disjoint blocks in Steiner systems, Eindhoven University of Technology, The Netherlands, April 8, 1992.