1. One-parameter semigroups of orthogonality preservers of JB*-algebras

   • Jorge J. Garcés
   • Antonio M. Peralta

   Original Paper 22 March 2021 Article: 43

2. Convolved fractal bases and frames

   • M. A. Navascués
   • P. Viswanathan
   • R. Mohapatra

   Original Paper 19 March 2021 Article: 42

3. Continuous frames for unbounded operators

   • Giorgia Bellomonte

   Original Paper Open access 18 March 2021 Article: 41

4. \(K_0\)-group of absolute matrix order unit spaces

   • Anil Kumar Karn
   • Amit Kumar

   Original Paper 17 March 2021 Article: 40

5. Local operator system structures and their tensor products

   • Surbhi Beniwal
   • Ajay Kumar
   • Preeti Luthra

   Original Paper 17 March 2021 Article: 39

6. \(L^p\)-projections on subspaces and quotients of Banach spaces

   • Vidal Agniel

   Original Paper 11 March 2021 Article: 38

7. Dunkl operators for arbitrary finite groups

   • Micho Đurđevich
   • Stephen Bruce Sontz

   Original Paper 10 March 2021 Article: 37

   

8. An abstract theorem on completeness of systems of root vectors of correct restrictions

   • K. S. Tulenov
   • L. K. Zhumanova

   Original Paper 08 March 2021 Article: 36

9. Operator ideals generated by strongly Lorentz sequence spaces

   • Dahmane Achour
   • Aldjia Attallah

   Original Paper 16 February 2021 Article: 35

10. A study of (wV)-like property on Banach spaces

    • Zeinab Soltani
    • Morteza Alikhani

    Original Paper 10 February 2021 Article: 34

11. Lipschitz type inequalities for noncommutative perspectives of operator monotone functions in Hilbert spaces

    • Silvestru Sever Dragomir

    Original Paper 09 February 2021 Article: 33

12. Non-commutative analogues of weak compactness criteria in symmetric spaces

    • Y. Nessipbayev
    • F. Sukochev
    • K. Tulenov

    Original Paper 09 February 2021 Article: 32

13. Coupling constant dependence for the Schrödinger equation with an inverse-square potential

    • A. G. Smirnov

    Original Paper 09 February 2021 Article: 31

    

14. Hardy type inequalities in generalized grand Lebesgue spaces

    • Joel E. Restrepo
    • Durvudkhan Suragan

    Original Paper 02 February 2021 Article: 30

15. Noncompactness of Toeplitz operators between abstract Hardy spaces

    • Alexei Karlovich

    Original Paper 29 January 2021 Article: 29

16. Finitely determined functions

    • M. Bachir
    • A. Fabre
    • S. Tapia-García

    Original Paper 19 January 2021 Article: 28

17. A new Hardy–Mulholland-type inequality with a mixed kernel

    • Michael Th. Rassias
    • Bicheng Yang
    • Andrei Raigorodskii

    Original Paper Open access 27 April 2021 Article: 27

18. A sequential approach to the convolution of Roumieu ultradistributions

    • Svetlana Mincheva-Kamińska

    Original Paper Open access 22 December 2020 Article: 26