1. On the Embedding of the Free Lattice of Rank 3 in the Lattice Freely Generated by Three Distributive Type Elements

   • A. G. Gein
   • M. P. Shushpanov

   OriginalPaper 27 June 2020 Pages: 203 - 210

2. Partitioning Transitive Tournaments into Isomorphic Digraphs

   • Attila Sali
   • Gábor Simonyi
   • Gábor Tardos

   OriginalPaper Open access 23 July 2020 Pages: 211 - 228

3. On k-tree Containment Graphs of Paths in a Tree

   • Liliana Alcón
   • Noemí Gudiño
   • Marisa Gutierrez

   OriginalPaper 22 August 2020 Pages: 229 - 244

4. On Frink Ideals in Orthomodular Posets

   • Mirko Navara
   • Pavel Pták

   OriginalPaper 03 August 2020 Pages: 245 - 249

5. On Convergence of Sequences in Complete Lattices

   • Wojciech Olszewski

   OriginalPaper 25 August 2020 Pages: 251 - 255

6. Homomorphism Order of Connected Monounary Algebras

   • Danica Jakubíková–Studenovská

   OriginalPaper 24 September 2020 Pages: 257 - 269

7. The Automorphism Conjecture for Ordered Sets of Dimension 2 and Interval Orders

   • Bernd S. W. Schröder

   OriginalPaper 26 September 2020 Pages: 271 - 281

8. Whitney Numbers for Poset Cones

   • Galen Dorpalen-Barry
   • Jang Soo Kim
   • Victor Reiner

   OriginalPaper 25 January 2021 Pages: 283 - 322

9. The Bounds for the Number of Linear Extensions Via Chain and Antichain Coverings

   • I. A. Bochkov
   • F. V. Petrov

   OriginalPaper 22 October 2020 Pages: 323 - 328

10. Fractional Local Dimension

    • Heather C. Smith
    • William T. Trotter

    OriginalPaper 29 October 2020 Pages: 329 - 350

11. Medians are Below Joins in Semimodular Lattices of Breadth 2

    • Gábor Czédli
    • Robert C. Powers
    • Jeremy M. White

    OriginalPaper Open access 20 November 2020 Pages: 351 - 363