An upper bound of the density for packing of congruent hyperballs in hyperbolic \(3-\)space Jenö Szirmai OriginalPaper Open access 22 March 2023 Pages: 453 - 466
Plenty of hyperbolicity on a class of linear homogeneous jerk differential equations Mário Bessa OriginalPaper Open access 29 March 2023 Pages: 467 - 487
Some sufficient conditions for path-factor uniform graphs Sizhong ZhouZhiren SunHongxia Liu OriginalPaper 28 February 2023 Pages: 489 - 500
Radon and Carathéodory type theorems for staircase convexity Marilyn Breen OriginalPaper 06 March 2023 Pages: 501 - 510
Randomly r-orthogonal factorizations in bipartite graphs Yuan YuanRong-Xia Hao OriginalPaper 05 December 2022 Pages: 511 - 522
The Hardy–Littlewood–Pólya inequality of majorization in the context of \(\mathbf {\omega }\)–\(\textbf{m}\)–star-convex functions Geanina Maria LăchescuIonel Rovenţa OriginalPaper 11 February 2023 Pages: 523 - 535
On forward-order law for core inverse in rings Amit KumarDebasisha Mishra OriginalPaper 26 December 2022 Pages: 537 - 562
On a family of matrix equalities that involve multiple products of generalized inverses Yongge Tian OriginalPaper 01 February 2023 Pages: 563 - 574
Hyers-Ulam stability of an iterative equation for strictly increasing continuous functions Rajendran PalanivelVeerapazham Murugan OriginalPaper 27 December 2022 Pages: 575 - 595
Extensions of the sine addition law with an extra term Bruce Ebanks OriginalPaper 22 November 2022 Pages: 597 - 618
Continuous selections and collectively fixed point theory with applications to generalized games Donal O’Regan OriginalPaper 11 November 2022 Pages: 619 - 628
Sincov’s and other functional equations and negative interest rates Gergely KissJens Schwaiger OriginalPaper Open access 03 January 2023 Pages: 629 - 637
A note on a functional equation on groups with involutions in two variables Xia LinHou Yu ZhaoShan Shan Guo OriginalPaper 25 January 2023 Pages: 639 - 648