1. Transitive Logics of Finite Width with Respect to Proper-Successor-Equivalence

   • Ming Xu

   OriginalPaper 05 April 2021 Pages: 1177 - 1200

2. Residuated Structures and Orthomodular Lattices

   • D. Fazio
   • A. Ledda
   • F. Paoli

   OriginalPaper Open access 17 April 2021 Pages: 1201 - 1239

3. Alternative Multilattice Logics: An Approach Based on Monosequent and Indexed Monosequent Calculi

   • Norihiro Kamide

   OriginalPaper 21 April 2021 Pages: 1241 - 1271

4. Neighbourhood Semantics for FDE-Based Modal Logics

   • S. Drobyshevich
   • D. Skurt

   OriginalPaper 21 April 2021 Pages: 1273 - 1309

5. Bayesian Belief Revision Based on Agent’s Criteria

   • Yongfeng Yuan

   OriginalPaper 28 May 2021 Pages: 1311 - 1346

6. Cut-free Sequent Calculus and Natural Deduction for the Tetravalent Modal Logic

   • Martín Figallo

   OriginalPaper 30 May 2021 Pages: 1347 - 1373

7. The Calculus of Natural Calculation

   • René Gazzari

   OriginalPaper Open access 09 June 2021 Pages: 1375 - 1411

8. On Implicational Intermediate Logics Axiomatizable by Formulas Minimal in Classical Logic: A Counter-Example to the Komori–Kashima Problem

   • Yoshiki Nakamura
   • Naosuke Matsuda

   OriginalPaper 11 June 2021 Pages: 1413 - 1422

9. A Few Notes on Quantum B-algebras

   • Shengwei Han
   • Xiaoting Xu

   OriginalPaper 12 June 2021 Pages: 1423 - 1440

10. Curry–Howard–Lambek Correspondence for Intuitionistic Belief

    • Cosimo Perini Brogi

    OriginalPaper Open access 16 June 2021 Pages: 1441 - 1461

11. Book Reviews

    • Grzegorz Sitek

    Book Reviews 09 April 2021 Pages: 1463 - 1466