Volume 18 (2026) – In Progress
Research Articles
Modified Total Sigma-Irregularity in Chemical Graphs
Darko Dimitrov, Slobodan Filipovski, Martin Knor, Riste Škrekovski
Pages: 1–7 | DOI: 10.47443/dml.2026.041
Hitting-Time Index of Trees: Bounds, Relationships, and Exact Formulas
Jinxia Liang, Mengya He, Bingde Xing, Yaping Mao, Boris Furtula
Pages: 8–15 | DOI: 10.47443/dml.2026.074
Short Proofs of Three Combinatorial Results in the Johnson Scheme
Danila Cherkashin, Yakov Shubin
Pages: 16–20 | DOI: 10.47443/dml.2026.157
Nonexistence of Almost Moore Digraphs with Self-Repeats of Diameter Greater Than Two
Arnau Messegué, Josep M. Miret
Pages: 21–27 | DOI: 10.47443/dml.2026.154
Reservoirs in Permutations
Aubrey Blecher, Arnold Knopfmacher
Pages: 28–33 | DOI: 10.47443/dml.2026.111
Corrigendum
Corrigendum to “Improved Bounds on the Domatic Numbers of Queens Graphs” [Discrete Math. Lett. 16 (2025) 94-99]
Juho Lauri
Pages: 34–35 | DOI: 10.47443/dml.2026.195
Research Articles
Generalizations of a Sum Rule for Derangements
Mark Shattuck
Pages: 36–42 | DOI: 10.47443/dml.2026.087
A Bijection Between Edges of the Turán Graph and Irreducible Elements in the Dominance Order Lattice
Nathanaël Hassler
Pages: 43–50 | DOI: 10.47443/dml.2026.050
On a Quadratic Relation Between Stanley–Wilf Limits and Füredi–Hajnal Limits
Mohamed Omar
Pages: 51–54 | DOI: 10.47443/dml.2026.084
Graphs with Small Triameters
Sergiy Kozerenko
Pages: 55–62 | DOI: 10.47443/dml.2026.127
Locally Even and Locally Odd Edge 2-Colorings of Pseudographs
Július Czap
Pages: 63–68 | DOI: 10.47443/dml.2026.153
New Combinatorial Identities Associated with Sun’s Identity
Necdet Batır
Pages: 69–76 | DOI: 10.47443/dml.2026.140
A Note on Directed Clique Token Sliding
Duc A. Hoang
Pages: 77–84 | DOI: 10.47443/dml.2026.159
The $r$-Hued Coloring of Complements of Cycles
Guozhen Zhang, Fengxia Liu
Pages: 85–92 | DOI: 10.47443/dml.2026.182
On Hamming Eigenvalues and Hamming Energy of Graphs
Harishchandra S. Ramane, Mallappa P. Mellikeri, Daneshwari D. Patil, Bolle Parvathalu
Pages: 93–99 | DOI: 10.47443/dml.2026.114
Bicyclic Graphs with Maximum Complementary Diminished Sombor Index
Nicholas Smirnov
Pages: 100–106 | DOI: 10.47443/dml.2026.164
On the $k$-Distance Chromatic Number of Unicyclic Graphs
Rosário Fernandes, Rúben Palma
Pages: 107–114 | DOI: 10.47443/dml.2026.206
Digital Consequences of Legendre’s Formula for Factorial Valuations
Armend Sh. Shabani
Pages: 115–121 | DOI: 10.47443/dml.2026.193
On Two Conjectures Concerning the Hyperbolic Sombor Index and Its Counterpart
Abeer M. Albalahi
Pages: 122–128 | DOI: 10.47443/dml.2026.217
Generalizing OOOOOOB
Alon Danai, Paul Ellis, Thotsaporn Aek Thanatipanonda
Pages: 129–136 | DOI: 10.47443/dml.2026.142
Irregularity and Near Star Graphs
Allan Bickle
Pages: 137–141 | DOI: 10.47443/dml.2026.248
A Complete Solution to the Conjecture on the Inverse Collatz–Sinogowitz Irregularity Problem
Xue Ji, Zhiwen Wang, Ji-Ming Guo
Pages: 142–149 | DOI: 10.47443/dml.2026.126