1. Best approximation theorems for almost cyclic contractions

   • S. Sadiq Basha

   OriginalPaper 29 April 2021 Article: 32

2. Localised time-periodic solutions of discrete nonlinear Klein–Gordon systems with convex on-site potentials

   • Dirk Hennig

   OriginalPaper 20 April 2021 Article: 31

3. On Hermitian positive definite solutions of a nonlinear matrix equation

   • Mohsen Masoudi
   • Abbas Salemi

   OriginalPaper 19 April 2021 Article: 30

   

4. Topological analysis of doubly nonlocal boundary value problems

   • Christopher S. Goodrich

   OriginalPaper 15 April 2021 Article: 29

5. New discontinuity results at fixed point on metric spaces

   • Nihal Özgür
   • Nihal Taş

   OriginalPaper 13 April 2021 Article: 28

6. Existence of positive solutions in the space of Lipschitz functions for a fractional boundary problem with nonlocal boundary condition

   • J. Caballero
   • B. López
   • K. Sadarangani

   OriginalPaper 10 April 2021 Article: 27

7. Eilenberg–Jachymski collections and its first consequences for the fixed point theory

   • Maher Berzig
   • Imed Kedim

   OriginalPaper 25 March 2021 Article: 26

8. A second-order adaptive Douglas–Rachford dynamic method for maximal \(\alpha \)-monotone operators

   • Ming Zhu
   • Rong Hu
   • Ya-Ping Fang

   OriginalPaper 20 March 2021 Article: 25

   

9. Local and global coincidence homology classes

   • Jean-Paul Brasselet
   • Tatsuo Suwa

   OriginalPaper 17 March 2021 Article: 24

10. Fixed point theorems for asymptotically regular semigroups equipped with generalized Lipschitzian conditions in metric spaces

    • Muhamad Najibufahmi
    • Atok Zulijanto

    OriginalPaper 16 March 2021 Article: 23

11. Affine minimax variational inequalities and matrix two-person games

    • Duong Thi Kim Huyen
    • Jen-Chih Yao

    OriginalPaper 16 March 2021 Article: 22

12. Multiple results to \(\phi \)-Laplacian singular Liénard equation and applications

    • Yun Xin
    • Zhibo Cheng

    OriginalPaper 15 March 2021 Article: 21

13. New algorithm for finding the solution of nonlinear matrix equations based on the weak condition with relation-theoretic F-contractions

    • Kanokwan Sawangsup
    • Wutiphol Sintunavarat

    OriginalPaper 10 March 2021 Article: 20

    

14. Existence and behavior of positive solutions for a class of linearly coupled systems with discontinuous nonlinearities in \({\mathbb {R}}^N\)

    • José Carlos de Albuquerque
    • Gelson G. dos Santos
    • Giovany M. Figueiredo

    Research Article 08 March 2021 Article: 19

    

15. On the Brzdȩk’s fixed point approach to stability of a Drygas functional equation in 2-Banach spaces

    • Ahmed Nuino

    OriginalPaper 01 March 2021 Article: 18

16. Coincidence of maps from connected sums of closed surfaces into graphs

    • Marcio Colombo Fenille

    OriginalPaper 01 March 2021 Article: 17

    

17. Two new self-adaptive algorithms for solving the split common null point problem with multiple output sets in Hilbert spaces

    • Simeon Reich
    • Truong Minh Tuyen

    OriginalPaper 27 February 2021 Article: 16

    

18. Applications of the Bielecki renorming technique

    • Mihály Bessenyei
    • Zsolt Páles

    OriginalPaper Open access 24 February 2021 Article: 15

19. Multivalued problems via orthogonal contraction mappings with application to fractional differential equation

    • Sumit Chandok
    • R. K. Sharma
    • Stojan Radenović

    OriginalPaper 24 February 2021 Article: 14

20. Existence and relaxation of solutions for evolution differential inclusions with maximal monotone operators

    • Amira Makhlouf
    • Dalila Azzam-Laouir
    • Charles Castaing

    OriginalPaper 18 February 2021 Article: 13

21. Existence and uniqueness of fixed points for monotone operators in partially ordered Banach spaces and applications

    • Mohamed Khazou
    • Mohamed Aziz Taoudi

    OriginalPaper 17 February 2021 Article: 12