Vol. 15 No. 1 (2020)

Articles

• An elementary, geometric proof of the non-existence of a projective plane of order 6

  Marcin Dumnicki, Janusz Gwozdziewicz, Justyna Szpond

  1-9

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• Corrigendum to ``"On the enumeration of a class of toroidal graphs" [Contrib. Discrete Math. 13 (2018), no. 1, 79-119]

  Dipendu Maity, Ashish Kumar Upadhyay

  10-11

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• Partitioning the $5\times 5$ array into restrictions of circles

  Robert Dawson

  12-21

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• Construction of strongly regular graphs having an automorphism group of composite order

  Dean Crnkovic, Marija Maksimovic

  22-41

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• The polar of convex lattice sets

  Jie Wang, Lin Si

  42-51

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• Pell Coding and Pell Decoding Methods with Some Applications

  Nihal Tas, Sumeyra Ucar, Nihal Yilmaz Ozgur

  52-66

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• Total colouring of some cartesian and direct product graphs

  Kyle MacKeigan, Jeannette Janssen

  67-71

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• On parity and recurrences for certain partition functions

  Darlison Nyirenda

  72-79

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• Factorizations of complete graphs into cycles and 1-factors

  Uğur Odabaşı

  80-89

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• On the first two entries of the f-vectors of 6-polytopes

  Jin Hong Kim

  90-101

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• Latin Squares and their Bruhat Order

  Rosário Fernandes, Henrique F. da Cruz, Domingos Salomão

  102-120

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• 3-uniform hypergraphs: modular decomposition and realization by tournaments

  Abderrahim Boussairi, Brahim Chergui, Pierre Ille, Mohamed Zaidi

  121-153

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• Nordhaus-Gaddum type inequalities for multiple domination and packing parameters in graphs

  Doost Ali Mojdeh, Babak Samadi, Lutz Volkmann

  154-162

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• Closed formulas and identities on the Bell polynomials and falling factorials

  Feng Qi, Da-Wei Niu, Dongkyu Lim, Bai-Ni Guo

  163-174

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• Some combinatorial properties of hexagonal lattices

  Lili Mu

  175-182

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