On the Embedding of the Free Lattice of Rank 3 in the Lattice Freely Generated by Three Distributive Type Elements A. G. GeinM. P. Shushpanov OriginalPaper 27 June 2020 Pages: 203 - 210
Partitioning Transitive Tournaments into Isomorphic Digraphs Attila SaliGábor SimonyiGábor Tardos OriginalPaper Open access 23 July 2020 Pages: 211 - 228
On k-tree Containment Graphs of Paths in a Tree Liliana AlcónNoemí GudiñoMarisa Gutierrez OriginalPaper 22 August 2020 Pages: 229 - 244
On Frink Ideals in Orthomodular Posets Mirko NavaraPavel Pták OriginalPaper 03 August 2020 Pages: 245 - 249
On Convergence of Sequences in Complete Lattices Wojciech Olszewski OriginalPaper 25 August 2020 Pages: 251 - 255
Homomorphism Order of Connected Monounary Algebras Danica Jakubíková–Studenovská OriginalPaper 24 September 2020 Pages: 257 - 269
The Automorphism Conjecture for Ordered Sets of Dimension 2 and Interval Orders Bernd S. W. Schröder OriginalPaper 26 September 2020 Pages: 271 - 281
Whitney Numbers for Poset Cones Galen Dorpalen-BarryJang Soo KimVictor Reiner OriginalPaper 25 January 2021 Pages: 283 - 322
The Bounds for the Number of Linear Extensions Via Chain and Antichain Coverings I. A. BochkovF. V. Petrov OriginalPaper 22 October 2020 Pages: 323 - 328
Fractional Local Dimension Heather C. SmithWilliam T. Trotter OriginalPaper 29 October 2020 Pages: 329 - 350
Medians are Below Joins in Semimodular Lattices of Breadth 2 Gábor CzédliRobert C. PowersJeremy M. White OriginalPaper Open access 20 November 2020 Pages: 351 - 363