1. Zero product preserving functionals on \(C(\varOmega )\)-valued spaces of functions

   • Ziba Pourghobadi
   • Fereshteh Sady
   • Masoumeh Najafi Tavani

   Original Paper 01 January 2020 Pages: 459 - 472

2. Generalization of Lax equivalence theorem on unbounded self-adjoint operators with applications to Schrödinger operators

   • Yidong Luo

   Original Paper 01 January 2020 Pages: 473 - 492

3. Polynomially normal operators

   • Dragan S. Djordjević
   • Muneo Chō
   • Dijana Mosić

   Original Paper 04 December 2019 Pages: 493 - 504

4. On compressions and generalized spectra of operators over \(C^{*}\)-algebras

   • Stefan Ivković

   Original Paper 04 December 2019 Pages: 505 - 522

5. On normed spaces with the Wigner Property

   • Ruidong Wang
   • Dariusz Bugajewski

   Original Paper Open access 04 December 2019 Pages: 523 - 539

6. Properties of two unitary operator functions involving idempotents

   • Jiaxin Zhang
   • Jiajia Niu
   • Yuan Li

   Original Paper 04 December 2019 Pages: 540 - 554

7. Inner functions in \(W_{\alpha }\) as improving multipliers

   • Juan Du
   • Liu Yang

   Original Paper 04 December 2019 Pages: 555 - 566

8. Weyl’s theorem for paranormal closed operators

   • Neeru Bala
   • G. Ramesh

   Original Paper 04 December 2019 Pages: 567 - 582

9. Strongly limited (Dunford–Pettis) completely continuous subspaces of operator ideals

   • Halimeh Ardakani
   • Manijeh Salimi
   • Seyed Mohammad Moshtaghioun

   Original Paper 04 December 2019 Pages: 583 - 594

10. Strongly measurable functions and multipliers of \({\mathcal {M}}-\) integrable functions

    • Savita Bhatnagar

    Original Paper 04 December 2019 Pages: 595 - 603

11. Almost convergence and Euler totient matrix

    • Serkan Demiriz
    • Merve İlkhan
    • Emrah Evren Kara

    Original Paper 04 December 2019 Pages: 604 - 616

12. Conditional expectation on non-commutative \(H^{(r,s)}_{p}(\mathcal {A};\ell _{\infty })\) and \(H_{p}(\mathcal {A};\ell _{1})\) spaces: semifinite case

    • D. Dauitbek
    • K. Tulenov

    Original Paper 01 January 2020 Pages: 617 - 625

13. Spectral properties for some extensions of isometric operators

    • T. Prasad

    Original Paper 04 December 2019 Pages: 626 - 633

14. Non-surjective coarse version of the Banach–Stone theorem

    • Igor A. Vestfrid

    Original Paper 01 January 2020 Pages: 634 - 642

15. Complex interpolation of vanishing Morrey spaces

    • Denny Ivanal Hakim
    • Yoshihiro Sawano

    Original Paper 01 January 2020 Pages: 643 - 661

16. Maximal Schrödinger operators with complex time

    • Yaoming Niu
    • Ying Xue

    Original Paper 01 January 2020 Pages: 662 - 679

17. Characterizations of \({*}\) and \({*}\)-left derivable mappings on some algebras

    • Guangyu An
    • Jun He
    • Jiankui Li

    Original Paper 17 December 2019 Pages: 680 - 692

18. On symmetry of strong Birkhoff orthogonality in \(B(\mathcal {H},\mathcal {K})\) and \(K(\mathcal {H},\mathcal {K})\)

    • Ryotaro Tanaka
    • Debmalya Sain

    Original Paper Open access 01 January 2020 Pages: 693 - 704

19. Permanence of weak comparison for large subalgebras

    • Xia Zhao
    • Xiaochun Fang
    • Qingzhai Fan

    Original Paper 15 January 2020 Pages: 705 - 717

20. Singularity preservers on the set of bounded observables

    • Maryam D. Nayeri
    • Mina Jamshidi
    • Mehdi Radjabalipour

    Original Paper 16 January 2020 Pages: 718 - 727

21. Approximation for link Ismail–May operators

    • Vijay Gupta
    • Gunjan Agrawal

    Original Paper 13 January 2020 Pages: 728 - 747

    

22. Inductive limit in the category of TRO

    • Arpit Kansal
    • Ajay Kumar
    • Vandana Rajpal

    Original Paper 31 January 2020 Pages: 748 - 760

23. A-Statistical \(L_{p}\) approximation properties of an integral variant of a general positive linear operators

    • Carmen Muraru
    • Ogün Doğru
    • Aslıhan Gülsün

    Original Paper 31 January 2020 Pages: 761 - 779

24. Essential spectrum of upper triangular operator matrices

    • Xiufeng Wu
    • Junjie Huang

    Original Paper 05 February 2020 Pages: 780 - 798

25. Singular dissipative third-order operator and its characteristic function

    • Ekin Uğurlu

    Original Paper 13 February 2020 Pages: 799 - 814

26. Inequalities for central moments and spreads of matrices

    • R. Sharma
    • R. Kumar
    • Purnima Devi

    Original Paper 31 January 2020 Pages: 815 - 830

27. Common best proximity pairs via the concept of complete proximal normal structure

    • Moosa Gabeleh
    • Jack Markin

    Original Paper 17 February 2020 Pages: 831 - 847

28. Additive maps preserving r-nilpotent perturbation of scalars on \(B({\mathcal {H}})\)

    • Ting Zhang
    • Jinchuan Hou
    • Xiaofei Qi

    Original Paper 13 February 2020 Pages: 848 - 865

29. Inequalities for the Heinz mean of sector matrices involving positive linear maps

    • Chaojun Yang
    • Fangyan Lu

    Original Paper 27 April 2020 Pages: 866 - 878

30. A new approach to numerical radius of quadratic operators

    • Jamal Rooin
    • Saeed Karami
    • Masoomeh Ghaderi Aghideh

    Original Paper 29 April 2020 Pages: 879 - 896