In celebration of the life of Professor János Aczél Bruce EbanksChe Tat Ng EditorialNotes 11 May 2020 Pages: 401 - 404
Invariant means and iterates of mean-type mappings Janusz MatkowskiPaweł Pasteczka OriginalPaper Open access 29 July 2019 Pages: 405 - 414
Weak limit of iterates of some random-valued functions and its application Karol Baron OriginalPaper Open access 05 April 2019 Pages: 415 - 425
Correction To: Weak limit of iterates of some random-valued functions and its application Karol Baron Correction 27 January 2020 Pages: 427 - 427
Stochastic processes generating Schur-convex sums Dawid KotrysKazimierz Nikodem OriginalPaper Open access 27 May 2019 Pages: 447 - 453
On the geometric concomitant equation Zenon Moszner OriginalPaper Open access 23 January 2020 Pages: 455 - 471
On a class of linear functional equations without range condition Eszter GselmannGergely KissCsaba Vincze OriginalPaper Open access 24 August 2019 Pages: 473 - 509
A functional equation on groups with involutions Che Tat NgHou Yu ZhaoXia Lin OriginalPaper 16 October 2019 Pages: 511 - 533
On a class of abstract convex cone valued functional equations Justyna Sikorska OriginalPaper Open access 01 August 2019 Pages: 535 - 545
A comparison among methods for proving stability Gian Luigi FortiEkaterina Shulman OriginalPaper 19 September 2019 Pages: 547 - 574
Investigations on the Hyers–Ulam stability of generalized radical functional equations Janusz BrzdękEl-sayed El-hadyJens Schwaiger OriginalPaper Open access 23 July 2019 Pages: 575 - 593
Fractals for minimalists Mihály BessenyeiEvelin Pénzes OriginalPaper Open access 06 September 2019 Pages: 595 - 603