1. Permanent, determinant, and rank of bi-block graphs

   • Ranveer Singh

   OriginalPaper 30 October 2019 Pages: 1 - 12

   

2. Perturbation of linear operators on Banach spaces: some applications to Schauder bases and frames

   • M. A. Navascués
   • P. Viswanathan

   OriginalPaper 24 September 2019 Pages: 13 - 36

3. The \(\varvec{r}\)-alternating permutations

   • István Mező
   • José L. Ramírez

   OriginalPaper 06 June 2019 Pages: 37 - 57

   

4. Existence of meromorphic solutions of some generalized Fermat functional equations

   • Linlin Wu
   • Chun He
   • Feng Lü

   OriginalPaper 24 September 2019 Pages: 59 - 69

   

5. On the Kesava Menon norm of semimultiplicative functions

   • Pentti Haukkanen

   OriginalPaper Open access 21 June 2019 Pages: 71 - 81

6. Nice results about quadratic type functional equations on semigroups

   • A. Akkaoui
   • M. El Fatini
   • D. Zeglami

   OriginalPaper 06 June 2019 Pages: 83 - 96

7. A variety of Steiner loops satisfying Moufang’s theorem: a solution to Rajah’s Problem

   • Aleš Drápal
   • Petr Vojtěchovský

   OriginalPaper 16 November 2019 Pages: 97 - 101

   

8. p-angular distance orthogonality

   • J. Rooin
   • S. Rajabi
   • M. S. Moslehian

   OriginalPaper 15 July 2019 Pages: 103 - 121

   

9. New results for the multiplicative symmetric equation and related conjecture

   • M. H. Hooshmand

   OriginalPaper 10 July 2019 Pages: 123 - 136

10. Approximately orthogonality preserving maps in Krein spaces

    • Ateyeh Saraei
    • Maryam Amyari

    OriginalPaper 05 December 2019 Pages: 137 - 149

11. Weighted extended g-Drazin inverse

    • Dijana Mosić
    • Long Wang

    OriginalPaper 25 May 2019 Pages: 151 - 161

12. New proofs of Melzak’s identity

    • Ulrich Abel

    OriginalPaper 26 June 2019 Pages: 163 - 167

13. New definitions of the generalized Stirling numbers

    • Michael Maltenfort

    OriginalPaper 05 October 2019 Pages: 169 - 200