###### INVITED TALKS

**Minimum number of edges of polytopes.**The 2nd International Conference of Combinatorics, Graph Theory, and Network Topology, University of Jember, Indonesia, 24-25 November 2018.**Three questions on graphs of polytopes.**Einstein Workshop Discrete Geometry and Topology, Freie Universität Berlin, Germany, 13-16 Mar 2018.

###### Conferences, workshops and Seminars

**Minkowski decompositions of polytopes via geometric graphs.**- Discrete Mathematics Seminar, Technical University of Berlin, Germany, 29 May 2019.

**Reconstruction of polytopes.**61st Annual AustMS Meeting (Mathematical Optimisation Session), Macquarie University, Sydney, Australia, 12-15 Dec 2017.**Connectivity of graphs of cubical polytopes.**5th International Combinatorics Conference, Monash University, 4-9 Dec 2017.**Two questions on graphs of polytopes.**Seminar session, Aalborg University, Aalborg, Denmark, Oct 2017.**The excess degree of a polytope and some of its applications.**- Monday Colloquium, Technical University of Berlin, Germany, 31 Oct 2016,
- Workshop on polytopes, RMIT University, Australia, 17 Nov 2015.

**On the maximum order of graphs embedded in surfaces**.- 7th International Workshop on Optimal Network Topologies (IWONT 2016), Tsinghua Sanya International Mathematics Forum, Sanya, 11-15 Jul 2016.
- 37th Australasian Conference on Combinatorial Mathematics and Combinatorial Computing (37ACCMCC), University of Western Australia, Australia, 9-13 Dec 2013.

**Results on graphs of polytopes.**Seminar session,**Almost simplicial polytopes I. The lower and upper bound theorems**.- Discrete Structures and Algorithms Seminar, University of Melbourne, Australia, Nov 2015.
- 59th Annual AustMS Meeting (Geometry and Topology Session), Flinders University, Adelaide, Australia, 28 Sep -1 Oct 2015.

**On the number of edges of polytopes.**Seminar on algebraic combinatorics,**.****Bipartite graphs whose order misses the bipartite Moore bound by two.**Seminar on algebraic combinatorics,**On the degree/diameter problem for minor-closed graph classes**. 36th Australasian Conference on Combinatorial Mathematics and Combinatorial Computing (36ACCMCC), University of New South Wales, Australia, 10-14 Dec 2012.**Maximum degree & diameter subgraph problem: Few results and a wealth of open problems**. 56th Annual AustMS Meeting (Combinatorics Session), Federation University Australia, Australia, 24-27 Sep 2012.**Characterisations of graphs of small defects and some of its applications**. 35th Australasian Conference on Combinatorial Mathematics and Combinatorial Computing (35ACCMCC), Monash University, Australia, 5-9 Dec 2011.**Hamiltonicity of Cayley, vertex-transitive and certain graph covers.**- Noon lectures, Charles University, Czech Republic, 20 Jan 2011.
- Seminar session, University of West Bohemia, Czech Republic, Feb 2011.

**Graphs with small defects**. 34th Australasian Conference on Combinatorial Mathematics and Combinatorial Computing (34ACCMCC), Australian National University, Australia, 6-10 Dec 2010.**On graphs with cyclic defect or excess**. 54th Annual AustMS Meeting (Combinatorics Session), The University of Queensland, Australia, 27-30 September, 2010.**Constructions of Large Graphs: Techniques, New Results and Open Problems**.- Seminar session, The University of Western Australia, Australia, Jan 2010
- 33rd Australasian Conference on Combinatorial Mathematics and Combinatorial Computing (33ACCMCC), University of Newcastle, Australia, 11-12 December, 2009.

**Bipartite graphs of defect 2**. GTA’08 Workshop, University of Newcastle, Australia, 7-11 December, 2009.**Advances in the degree/diameter problem.**Seminar session, The University of Newcastle, Australia, Mar 2008.**On the nonexistence of even degree graphs of diameter 2 and defect****2**. The 14th Computing: The Australian Theory Symposium (CATS 2008), University of Wollongong, Australia, 22-25 January, 2008.**On the nonexistence of odd degree graphs of diameter 2 and defect 2**. 18th International Workshop on Combinatorial Algorithms (IWOCA 2007), Newcastle, Australia, 5-7 November, 2007.**New results on the degree/diameter problem**.- Seminar session, University of West Bohemia, Czech Republic, Oct 2007.
- 2nd International Workshop on Optimal Network Topologies (IWONT 2007), Pilsen, Czech Republic, 17-21 Sep 2007.

**On graphs of maximum degree 5, diameter D and defect 2**. 2nd Doctoral Workshop on Mathematical and Engineering Methods in Computer Science (MEMICS 2006), Mikulov, Czech Republic, 27-29 Nov 2006.**On the degree/diameter problem for both bipartite and non-bipartite graphs**.- Seminar session, University of West Bohemia, Czech Republic, Oct 2006.
- Seminar session, University of Lleida, Spain, Oct 2006.

**New largest graphs of diameter 6**. 5th Cracow Conference on Graph Theory, Ustron, Poland, 11-15 Sep 2006.**On (Delta,2,2)-graphs**. 15th Workshop Cycles and Colorings, Tatranska Strba, Slovakia, 3-8 Sep 2006.**On Large Graphs with Given Degree and Diameter**. 16th Australasian Workshop on Combinatorial Algorithms, University of Ballarat, Australia, 18-21 Sep 2005.