1. A remark on the Brauer–Fowler theorems

   • Enrico Jabara

   OriginalPaper 14 January 2021 Pages: 601 - 609

2. On groups with all proper subgroups finite-by-abelian-by-finite

   • Ulderico Dardano
   • Fausto De Mari

   OriginalPaper 17 February 2021 Pages: 611 - 619

3. Characterization of topological groups by discrete cocompact subgroups

   • Bilel Kadri

   OriginalPaper 15 February 2021 Pages: 621 - 628

4. Regular orbits of self-dual modules

   • Ping Jin
   • Yong Yang

   OriginalPaper 13 February 2021 Pages: 629 - 635

5. Certain monomial ideals whose numbers of generators of powers descend

   • Reza Abdolmaleki
   • Shinya Kumashiro

   OriginalPaper 24 March 2021 Pages: 637 - 645

6. Tate–Hochschild cohomology for periodic algebras

   • Satoshi Usui

   OriginalPaper 19 February 2021 Pages: 647 - 657

   

7. A note on sequences not having metric Poissonian pair correlations

   • Felipe A. Ramírez

   OriginalPaper 15 February 2021 Pages: 659 - 665

8. (Non-)Distributivity of the product for \(\sigma \)-algebras with respect to the intersection

   • Alexander Steinicke

   OriginalPaper Open access 22 February 2021 Pages: 667 - 675

9. A gradient maximum principle of solutions for a quasilinear parabolic equation

   • Qingwei Li
   • Menglan Liao

   OriginalPaper 12 February 2021 Pages: 677 - 682

10. A sharp integral inequality for closed spacelike submanifolds immersed in the de Sitter space

    • Henrique F. de Lima
    • Fábio R. dos Santos
    • Lucas S. Rocha

    OriginalPaper 12 April 2021 Pages: 683 - 691

11. \(L^2_f\)-harmonic 1-forms on smooth metric measure spaces with positive \(\lambda _1(\Delta _f)\)

    • Jiuru Zhou

    OriginalPaper 10 April 2021 Pages: 693 - 706

12. Weighted exponential inequality for differentially subordinate martingales

    • Michał Brzozowski

    OriginalPaper Open access 11 April 2021 Pages: 707 - 720