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Quaternion-valued multiplicative functions on semigroups Ayoub OuhabiDriss ZeglamiMohamed Ayoubi OriginalPaper 27 February 2024
Homi-repair under iteration (II): oscillating discontinuities and pre-discontinuities Xiaohua LiuLiu LiuWeinian Zhang OriginalPaper 25 February 2024 Pages: 381 - 397
A note on convex solutions to an equation on open intervals Chaitanya Gopalakrishna OriginalPaper 24 February 2024
Zonal labelings and Tait colorings from a new perspective Andrew BowlingWeiguo Xie OriginalPaper 21 February 2024
Homi-repair under iteration (I): removable and jumping cases Xiaohua LiuLiu LiuWeinian Zhang OriginalPaper 20 February 2024 Pages: 351 - 379
Disprove of a conjecture on the double Roman domination number Z. ShaoR. KhoeilarS. M. Sheikholeslami OriginalPaper 16 February 2024 Pages: 241 - 260
Exponential semi-polynomials and their characterization on semigroups Bruce Ebanks OriginalPaper 13 February 2024
Generalized Vincze’s functional equations on any group in connection with the maximum functional equation Muhammad SarfrazZhou JiangYongjin Li OriginalPaper 03 February 2024 Pages: 173 - 188
Vortex filament flows for curves in a 3-dimensional pseudo-Riemannian manifold Zühal Küçükarslan YüzbaiNevin Ertug GürbüzDae Won Yoon OriginalPaper 24 January 2024 Pages: 261 - 274
Correction to: Regularity properties of k-Brjuno and Wilton functions Seul Bee LeeStefano MarmiTanja I. Schindler Correction Open access 17 January 2024 Pages: 349 - 350
Notes on the arithmetic–geometric mean inequality Ahmad Al-NatoorOmar HirzallahFuad Kittaneh OriginalPaper 17 January 2024
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On a class of functional difference equations: explicit solutions, asymptotic behavior and applications Nataliya Vasylyeva OriginalPaper 21 December 2023 Pages: 99 - 171
Remarks on Wright-convex functions Andrzej Olbryś OriginalPaper Open access 12 December 2023 Pages: 1157 - 1171
Quadratic functions fulfilling an additional condition along the hyperbola \(\pmb {xy = 1} \) Zoltán BorosEdit Garda-Mátyás OriginalPaper Open access 25 November 2023 Pages: 1141 - 1155
Some extremal problems for polygons in the Euclidean plane Yuriĭ Gennadievich NikonorovOl’ga Yur’evna Nikonorova Report 22 November 2023 Pages: 603 - 624
Spectra for upper triangular linear relation matrices through local spectral theory Teresa ÁlvarezSonia Keskes OriginalPaper 22 November 2023 Pages: 399 - 422
Further remarks on local K-boundedness of K-subadditive set-valued maps Eliza JabłońskaKazimierz Nikodem OriginalPaper Open access 21 November 2023 Pages: 981 - 993
The 59th International Symposium on Functional Equations Hotel Aurum, Hajdúszoboszló (Hungary), June 18–25, 2023 Report of Meeting 20 November 2023 Pages: 1259 - 1290
Zero utility principles coinciding on binary risks Jacek ChudziakMałgorzata Chudziak OriginalPaper Open access 20 November 2023 Pages: 1245 - 1258
The equation \(\pmb {f(xy) = f(x)h(y) + g(x)f(y)}\) and representations on \(\pmb {\mathbb {C}^2}\) Henrik Stetkær OriginalPaper Open access 16 November 2023
Achromatic arboricity on complete graphs Gabriela Araujo-PardoChristian Rubio-Montiel OriginalPaper Open access 14 November 2023 Pages: 1 - 12
Characterizations of Jordan *-isomorphisms of \(C^*\)-algebras by Schatten p-norm of Kubo–Ando means Kaixuan LiLei LiLiguang Wang OriginalPaper 12 November 2023 Pages: 87 - 97
New constructions of t-norms and t-conorms on bounded lattices Jie Qiong ShiBin Zhao OriginalPaper 08 November 2023
Generalizations of certain conditions for Drazin inverse expressions of anti-triangular partitioned matrices Daochang ZhangYu JinDijana Mosić OriginalPaper 31 October 2023
Remarks on a linearization of Koopmans recursion Marek Cezary Zdun OriginalPaper Open access 20 October 2023 Pages: 1033 - 1049
A classification of non-monotonicity height for piecewise monotone functions (I): increasing case Kui WuLin LiWei Song OriginalPaper 19 October 2023 Pages: 287 - 302
Functional equations stemming from ‘scientific laws’ Juan C. Candeal OriginalPaper Open access 19 October 2023 Pages: 751 - 772
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On the functional equation \(\hbox {f}(\hbox {x}+\hbox {y})=\hbox {g}(\hbox {xy})\) Péter ErdeiTamás GlavositsAttila Házy OriginalPaper Open access 16 October 2023 Pages: 773 - 786
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On sets related to integer partitions with quasi-required elements and disallowed elements Aureliano M. Robles-PérezJosé Carlos Rosales OriginalPaper Open access 13 October 2023 Pages: 423 - 440
Weighted Ingham-type inequalities via the positivity of quadratic polynomials Ionel RovenţaLaurenţiu Emanuel TemereancăMihai Adrian Tudor OriginalPaper 11 October 2023 Pages: 865 - 883
Refinements of discrete and integral Jensen inequalities with Jensen’s gap László Horváth OriginalPaper Open access 11 October 2023 Pages: 557 - 577
The Artin-Hasse series and Laguerre polynomials modulo a prime Marina AvitabileSandro Mattarei OriginalPaper Open access 10 October 2023
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Angular structure of equiangular cones in Euclidean spaces Daniel GourionAlberto Seeger OriginalPaper 29 September 2023
Some study of the approximate Birkhoff orthogonality and orthogonality of bounded linear operators Huayou XieChuanjiang ZhouYongjin Li OriginalPaper 27 September 2023 Pages: 819 - 835
Functional equations, alternating expansions, and generalizations of the Salem functions Symon Serbenyuk OriginalPaper 26 September 2023
