1. A survey on measures of noncompactness with some applications in infinite systems of differential equations

   • Mohammad Mursaleen
   • Vladimir Rakočević

   Survey 27 September 2021 Pages: 489 - 514

2. The order structure of forts iterated by quadratic polynomials

   • Lili Yang
   • Zhiheng Yu

   OriginalPaper 02 April 2022 Pages: 515 - 524

   

3. Row-summable matrices with application to generalization of Schröder’s and Abel’s functional equations

   • Ali Bayati Eshkaftaki

   OriginalPaper 09 August 2021 Pages: 525 - 533

4. Area computation for triangular area or perimeter bisecting deltoids

   • Allan Berele
   • Stefan Catoiu

   OriginalPaper 05 August 2021 Pages: 535 - 547

   

5. A variant of d’Alembert’s functional equation on semigroups with an anti-endomorphism

   • Mohamed Ayoubi
   • Driss Zeglami

   ReviewPaper 19 July 2021 Pages: 549 - 565

6. Quadratic ellipsoids in Minkowski geometries

   • Árpád Kurusa

   OriginalPaper Open access 03 August 2021 Pages: 567 - 578

   

7. On the convergence of generalized power series solutions of q-difference equations

   • Renat Gontsov
   • Irina Goryuchkina
   • Alberto Lastra

   OriginalPaper 01 June 2021 Pages: 579 - 597

8. On isoptics and isochordal-viewed curves

   • David Rochera

   OriginalPaper 16 July 2021 Pages: 599 - 620

   

9. On optimal inequalities between three-point quadratures

   • Andrzej Komisarski
   • Szymon Wa̧sowicz

   OriginalPaper Open access 17 January 2022 Pages: 621 - 638

   

10. A note on generalized invertibility and invariants of infinite matrices

    • Markus Seidel

    OriginalPaper Open access 28 May 2021 Pages: 639 - 652

11. On curves with circles as their isoptics

    • Waldemar Cieślak
    • Witold Mozgawa

    OriginalPaper Open access 28 June 2021 Pages: 653 - 667

    

12. When are maps preserving semi-inner products linear?

    • Paweł Wójcik

    OriginalPaper Open access 03 July 2021 Pages: 669 - 676

13. Distributivity equations for aggregation operations with annihilator over uninorms

    • Dragan Jočić
    • Ivana Štajner-Papuga

    OriginalPaper 10 August 2021 Pages: 677 - 699

    

14. Properties of Motzkin triangle and t-generalized Motzkin sequences

    • László Németh
    • László Szalay

    OriginalPaper Open access 05 February 2022 Pages: 701 - 721