CONTENTS OF VOLUME 39-1

KUNLE ADEGOKE, ROBERT FRONTCZAK, TARAS GOY:
Fibonacci sums modulo 5
   1  
BILENDER P. ALLAHVERDIEV, HÜSEYIN TUNA, HAMLET A. ISAYEV:
The resolvent of impulsive singular Hahn–Sturm–Liouville operators 		  23  
JOSÉ L. ANSORENA:
A really simple elementary proof of the uniform boundedness principle in F-spaces		   42  
MOHAMMAD ASIM, MOHAMMAD IMDAD:
Fixed point and best proximity point results in PIV-S-metric spaces		   46  
SABRI BAHROUNI:
Symmetrization for mixed operators		   64  
JASON BENTLEY, PIOTR MIKUSIŃSKI:
Transfunctions applied to plans, Markov operators and optimal transport		   76  
R.C. BREWSTER, C.M. MYNHARDT, L.E. TESHIMA:
The realizability of theta graphs as reconfiguration graphs of minimum independent dominating sets		   94  
DOROTA BRÓD, ANETTA SZYNAL-LIANA:
On Mersenne numbers and their bihyperbolic generalizations		   130  
AHMED JAFAR,OMAR AJEBBAR,ELHOUCIEN ELQORACHI:
A Kannappan-cosine functional equation on semigroups		   143  
LENNY JONES:
Reciprocal monogenic septinomials of degree 2n3		   155  
MATEUSZ WORONOWICZ:
A note on abelian groups supporting unital rings		   170  

CONTENTS OF VOLUME 39-2

MICHAEL LIN:
Global central limit theorems for stationary Markov chains
   177  
ANTENEH TILAHUN ADIMASU:
Almost everywhere convergence of varying parameter setting Cesàro means of Fourier series with respect to Walsh–Kaczmarz system 		  190  
AHMED AKKAOUI, BRAHIM FADLI:
New results about quadratic functional equation on semigroups		   209  
ALBO CARLOS CAVALHEIRO:
On the Dirichlet problem for a class of nonlinear degenerate elliptic equations in weighted Sobolev spaces		   223  
DIKSHA DEBBARMA, BINOD CHANDRA TRIPATHY:
Relative uniform convergence of quantum difference sequence of functions related to lp-space defined by Orlicz function		   248  
BRUCE EBANKS:
Derivation pairs on rings and rngs		   269  
TULSI DASS NARANG, SUMIT CHANDOK, SAHIL GUPTA:
On various types of uniform rotundities		   281  
MARTA NOWAKOWSKA:
Algebraic properties of semi-direct sums of rings		   319  
KRZYSZTOF PIEJKO, LUCYNA TROJNAR-SPELINA:
On (k1A1, k2A2, k3A3)-edge colourings in graphs and generalized Jacobsthal numbers		   331  
IHYA TALIBI, FARAH BALAADICH, BRAHIM EL BOUKARI, JALILA EL GHORDAF:
On weak solutions to parabolic problem involving the fractional p-Laplacian via Young measures		   349  
ANITA ZGORZELSKA, HANNA GUZE:
A note on bifurcation of equilibrium forms of a gas balloon parachute		   368  
Report of Meeting:
The Twenty-fourth Debrecen–Katowice Winter Seminar on Functional Equations and Inequalities Hajdúszoboszló (Hungary), February 6–9, 2025		   381  



Full texts are available at the Silesian Digital Library (and here)