5^{th} Catania
Combinatorial Conference

HyGraDe
2022

July 6-7-8, 2022

University of Catania

## Conference Program

The program of the conference can be downloaded here.
#### Wednesday July 6

08:30 - 09:30 **REGISTRATION**

09:30 - 10:00 Welcome

**Invited Talks**

10:00 - 11:00 Marco Buratti: *The goose of the golden differences is still alive*

11:00 *Coffee Break*

11:30 - 12:30 Marién Abreu: *Cubic graphs: some whereabouts of their perfect
matchings, 2-factors and edge-colourings*

12:30 *Lunch Break*

**Contributed Talks**

15:30 - 15:50 Francesca Merola: *Equitably 2-colourable cycle systems*

15:55 - 16:15 Anamari Nakic: *Designs from parallel lines of an affine geometry*

16:20 - 16:40 Sanja Rukavina: *On one property of the incidence graphs of 2-designs*

16:45 *Break*

17:15 - 17:35 Marija Maksimović: *Regular two-graphs from strongly regular graphs*

17:40 - 18:00 Silvia Pagani: *Ghosts behind polynomials*

18:05 - 18:25 Francesco Strazzanti: *Cut-point sets of a finite simple graph*

18:30 - 18:50 Maria Flavia Mammana: *From research to classroom: the case of k-permutations*

#### Thursday July 7

**Invited Talks**

09:30 - 10:30 Vitaly I. Voloshin: *From the history of Mixed Hypergraph Coloring*

10:30 *Coffee Break*

11:00 - 12:00 Zsolt Tuza: *3-uniform hypercycle systems*

**Contributed Talks**

12:05 - 12:25 Harald Gropp: *Configurations in Sicily before 1910 and after 1986*

12:45 *Conference Photo*

15:00 - 15:20 Simone Costa: *On Sequences with Distinct Partial Sums*

15:25 - 15:45 Stefano Innamorati: *Characterizing subgeometries PG(5,q) of PG(5,q^2)*

15:50 - 16:10 Lorenzo Mella: *A tour problem on a multidimensional toroidal array*

16:15 *Break*

16:45 - 17:05 Claudia Cavallaro: *Graphs for Computer Science: an application in geo-spatial data analysis*

17:10 - 17:30 Elena Guardo: *Steiner systems and configurations of points*

19:00 Bus in Piazza Trento for SOCIAL DINNER, Ristorante LACHEA (Piazza G.
Verga, Aci Trezza)

#### Friday July 8

**Invited Talks**

09:30 - 10:30 Anita Pasotti: *An overview of Heffter arrays*

10:30 *Coffee Break*

11:00 - 12:00 Mariusz Meszka: *Maximal partial designs*

**Contributed Talks**

12:05 - 12:25 Salvatore Milici: *Graph factorizations of the complete graph: results and open questions*

12:30 - 12:50 Alfio Giarlotta: *Combinatorics in choice theory: Bounded rationality is rare*