Aequationes Mathematicae

Article	Citations
n-gon centers and central lines	35
On a combinatorial identity of Gavrea and Ivan and related results	31
A note on the four color theorem	22
Hyers-Ulam stability of a general linear partial differential equation	14
Packing squares into a rectangle with a relatively small area	11
Balanced Stirling numbers	10
Report of Meeting Aczél100 Hotel Aurum, Hajdúszoboszló (Hungary), February 2–7, 2025	7
Casting light on integer compositions	7
On a family of analytic diassociative loops	7
A class of functional equations for additive functions	6
A divided-difference characterization of polynomials over finite fields of characteristic two	6
Orthogonality induced by norm derivatives: a new geometric constant and symmetry	6
Bases consisting of self-referential functions in Banach spaces	5
Recent progress on minimal hypersurfaces with cylindrical tangent cones	5
Continuous selections and collectively fixed point theory with applications to generalized games	5
Vector-valued invariant means	4
On an equality of means and a characterization of the logarithmic mean	4
The number of independent sets in bipartite graphs and benzenoids	4
Correction to: Vector-valued Banach limits and the linear span property	4
Regular polygons on isochordal-viewed hedgehogs	4
Regularity properties of k-Brjuno and Wilton functions	4
Weakly associative functions and means - new examples and open questions	4
Correction to: There is at most one continuous invariant mean	4
Global forcing number for maximal matchings in corona products	4
Equalities for mixed operations of Moore–Penrose and group inverses of a matrix	4

A generalization of the cosine addition law on semigroups	4
Discrete Time-dependent wave equations II. Semiclassical Fractional Klein-Gordon equation	4
The singular evolutoids set and the extended evolutoids front	4
Continuous dependence of the weak limit of iterates of some random-valued vector functions	3
Extreme area and perimeter bisectors in a triangle	3
A generalization of the Kannappan-sine addition law on semigroups	3
On q-generalized (r, s)-Stirling numbers	3
Randomly r-orthogonal factorizations in bipartite graphs	3
A functional equation related to Wigner’s theorem	3
Additive operators approximately preserving Birkhoff–James orthogonality	3
Regular solutions of a functional equation derived from the invariance problem of Matkowski means	3
Adjacencies for recognition of digital Jordan surfaces	3
Functional equations stemming from ‘scientific laws’	3
Explicit forms of invariant means: complementary results to Gauss $$\left( {\mathcal {A}},{\mathcal {G}}\right) $$-theorem and some applications	3
László Székelyhidi	3
Dimension preserving approximation	3
Comparability of Metrics and Norms in terms of Basis of Exponential Vector Space	3
Matrix inequalities between $$f(A)\sigma f(B)$$ and $$A\sigma B$$	3
Characterization of affine differences and related forms	3
Further results on positively homogeneous subadditive functions by using Csiszár f-divergence	3
On iterative roots of injective functions	3
A new equation related to two-sided centralizers in prime rings	3
More results on the signed double Roman k-domination in graphs	2
A classification of non-monotonicity height for piecewise monotone functions (I): increasing case	2
On some linear functional equations with continuous solutions	2
A study on Davison’s functional equation for set-valued functions	2
On two functional equations of finite order and their complex-valued solutions with prescribed asymptotics	2
Extending EP matrices by means of recent generalized inverses	2
Bisector fields and pencils of conics	2
Some new minimax inequalities for centered convex bodies	2
Angular structure of equiangular cones in Euclidean spaces	2
An Application of Viscosity Approximation Type Iterative Method in the Generation of Mandelbrot and Julia Fractals	2
Characterizations of weighted generalized inverses	2
A tribute to János Aczél	2
Invariance problems of generalized weighted classical means	2
Uniformly-like convex solutions for the polynomial-like iterative equation in Banach spaces	2
Some investigations on the U-partial order induced by uninorms	2
The values of zeta functions composed by the Hurwitz and periodic zeta functions at integers	2
A Kannappan-sine subtraction law on semigroups	2
On metric stability of set-valued subadditive functions	2
Skew Dyck paths with air pockets	2
Some explicit values of a q-multiple t-function at roots of unity	2
Stability of $$\varepsilon $$-isometries and their symmetrizations on the positive cones of $$c_0$$	2
New generalizations of Steffensen’s inequality by Lidstone’s polynomial	2
Global asymptotic stability of one time-continuous and two time-discrete models for ethanol metabolism in the human body	2
On multiadditive set-valued maps “modulo K”	2
A note on homotopy extension KKM type maps	2
Operators with a non-trivial closed invariant affine subspace	2
General hyperstability criteria for Jensen-type equations	2
New lower bound for the optimal congruent geodesic ball packing density of screw motion groups in $$\textbf{H}^2\!\times \!\textbf{R}$$ space	2

A method to find any solution of $$f(p(x)) = q(f(x))$$ with given strictly increasing continuous real functions p, q	2
Sparse groups need not be semisparse	2
On digital sequences associated with Pascal’s triangle	2
On polyhedral graphs and their complements	1
Vector valued invariant means, complementability and almost constrained subspaces	1
Some sufficient conditions for path-factor uniform graphs	1
Correction: On two functional equations of finite order and their complex-valued solutions with prescribed asymptotics	1
Sections and projections of nested convex bodies	1
Characterizing spanning trees via the size or the spectral radius of graphs	1
On the solvability of the (SSIE) with operator $${D}_{x} {\mathbf { * }}\left( { s}_{ R}^{{\textbf{0}}} \right) _{{{{\Sigma }} - {\lambda I}}} {{ \subset }}{ s}_{ R}^{{{0}}} $$, involving the fine spe	1
Another approach to K-subadditivity	1
Alienation of Drygas’, Cauchy’s, Jensen’s and the quadratic equations on semigroups with an involutive automorphism	1
Maker-Breaker resolving game played on corona products of graphs	1
About Sobolev spaces on fractals: fractal gradians and Laplacians	1
Some characterizations of the disc by properties of isoptic triangles	1
On distance spectral radius of graphs with given number of pendant paths of fixed length	1
Overpartitions in terms of 2-adic valuation	1
The Artin-Hasse series and Laguerre polynomials modulo a prime	1
On strongly m-convex stochastic processes	1
On the critical exponents of generalized ballot sequences in three dimensions and large tandem walks	1
On the Li–Zheng theorem	1
On a variant of Tingley’s problem for $$\ell ^p(\Gamma , H)$$ spaces for $$p\in [1, \infty ]$$	1
Proof of a conjecture due to Chu on Gosper-type sums	1
Report of Meeting The 61st International Symposium on Functional Equations, Cluj-Napoca (Romania), June 15–21, 2025	1
Pexider invariance equation for embeddable mean-type mappings	1
On monohedral tilings of a regular polygon	1
Discrete time scales with two quanta and Ulam stability	1
Constructing Ricci vector fields on $${\mathbb {R}}^2$$ with a diagonal metric	1
Elephant polynomials	1
Max and min phase-isometries on the unit sphere of $$\ell _p(\Gamma )$$-type spaces for $$p>0$$	1
Prefixes of bargraph paths	1
Sections in functional equations: stability and hyperstability	1
On the functional equation $$\hbox {f}(\hbox {x}+\hbox {y})=\hbox {g}(\hbox {xy})$$	1
On Jensen’s inequality involving divided differences of convex functions	1
Distributivity and conditional distributivity of bi-uninorms over uninorms	1
Mathematical models of functional extreme leaning machins: operator-algebraic and free-probabilistic approaches	1
Angular structure of Reuleaux cones	1
On composition and Right Distributive Law for formal power series of multiple variables	1
On evolutes of curves in the isotropic plane	1
Points of monotonicity in F-normed Orlicz function spaces	1
On certain composite functional equations associated with the Dirichlet function	1
Exponential semi-polynomials and their characterization on semigroups	1
Extensions of the sine addition law with an extra term	1
Isometry groups of six-dimensional nilmanifolds	1
A characterization of the Euclidean ball via antipodal points	1
Axiomatic characterization of the $$\chi ^{2}$$ dissimilarity measure	1
Sorting 1-away permutations with underlying Fibonacci convolutions	1
Note on the variance of generalized random polygons	1
Enumeration of labeled connected bipartite graphs with given Betti number	1
The minmin coalition number in graphs	1
Clique trees with a given zero forcing number maximizing the $$A_\alpha $$-spectral radius	1
Darboux and shift-compactness paradigms: Automatic continuity in the Gołąb-Schinzel and the Goldie equations	1
The monomial functional equation for connected Lie groups	1
Hyers-Ulam stability of an  iterative  equation  for  strictly increasing continuous functions	1
Characterization of the Bernoulli polynomials via the Raabe functional equation	1
Some study of the approximate Birkhoff orthogonality and orthogonality of bounded linear operators	1
On some classes of multiplicative functions	1
On an alternative additive-quadratic functional equation	1
On the maximal part in unrefinable partitions of triangular numbers	1
Zero utility principles coinciding on binary risks	1
Weakly contractive in mean random-valued functions and two linear functional equations	1
On the equality problem of two-variable Bajraktarević means under first-order differentiability assumptions	1
Quadratic functions fulfilling an additional condition along the hyperbola $$\pmb {xy = 1} $$	1
On surface of Apollonius of two ellipsoids	1
Quaternion-valued multiplicative functions on semigroups	1
Odd strength spherical designs attaining the Fazekas–Levenshtein bound for covering and universal minima of potentials	1
Metric symmetry and distance distribution functions on graphs	0
Cosine subtraction laws	0
On the state of the second part of Hilbert’s fifth problem	0
The cosine addition and subtraction formulas on non-abelian groups	0
Solutions of the functional difference Toda equation from centered Darboux transformation	0
On forward-order law for core inverse in rings	0
Gromov hyperbolicity of Johnson and Kneser graphs	0
Radon and Carathéodory type theorems for staircase convexity	0
Characterizations of derivations on spaces of smooth functions	0
On a sine addition/subtraction law on semigroups	0
Monomial functions, normal polynomials and polynomial equations	0
A combinatorial approach to prove an explicit form of some iteration groups	0
Remarks on some generalized Sincov equations	0
On supertranslativity of the Orlicz premium principle	0

Independent transversal domination in trees, products and under local changes to a graph	0
Partitions associated to class groups of imaginary quadratic number fields	0
Correction to: On the solvability of the (SSIE) with operator $${D}_{x} {\mathbf { * }}\left( { s}_{ R}^{{\textbf{0}}} \right) _{{{{\Sigma }} - {\lambda I}}} {{ \subset }}{ s}_{ R}^{{{0}}} $$, involvi	0
On the minimality of the Winterbottom shape	0
Some extremal problems for polygons in the Euclidean plane	0
The order structure of forts iterated by quadratic polynomials	0
Semi-classical 2-dimensional Minkowski planes	0
Three inequalities that characterize the exponential function	0
General criteria for hyperstability of Cauchy-type equations	0
Deviation from equidistance for one-dimensional sequences	0
Convex functions and approximate Birkhoff–James orthogonality	0
Twisted coefficients on coarse spaces and their corona	0
An upper bound of the density for packing of congruent hyperballs in hyperbolic $$3-$$space	0
On measure of noncompactness in Lebesgue and Sobolev spaces with an application to the functional integro-differential equation	0
A note on iterated maps of the unit sphere	0
Levin–Cochran–Lee inequalities and best constants on homogeneous groups	0
$${\Sigma }$$-Modules in cotorsion Pairs	0
On a functional equation on groups in two variables	0
Iterative roots of PM functions extended from the characteristic interval	0
Minimal codewords in Norm-Trace codes	0
Analytical aspects of a q, r-analogue of poly-Stirling numbers of both kinds	0
A note on the problem of the parallelogram of forces (the axiomatization of vector addition)	0
On even orthogonally additive mappings in orthogonality spaces	0
A note on ideal C$$^*$$-completions and amenability	0
On the extremal compatible linear connection of a generalized Berwald manifold	0
Behavior of convex integrand at a d-apex of its Wulff shape and approximation of spherical bodies of constant width	0
Polynomially EP operators	0
Spectra for upper triangular linear relation matrices through local spectral theory	0
Bounds on the first outdegree Zagreb index of digraphs	0
Redistributing algorithms and Shannon’s Entropy	0
Weighted Ingham-type inequalities via the positivity of quadratic polynomials	0
An alternative equation for generalized monomials	0
Continuous inverse ambiguous functions on Lie groups	0
Alienation of the quadratic, exponential and d’Alembert functional equations	0
Coincidence theory for lower semicontinuous type maps with decomposable values	0
Domination parameters and added matchings	0
Some moduli related to $$\rho _{\pm }$$-orthogonalities and semi-orthogonality in Banach spaces	0
Set valued pexiderized quadratic functional equation	0
Generalized Vincze’s functional equations on any group in connection with the maximum functional equation	0
Basic sets for some basic functional equations	0
Vector-valued Banach limits and the linear span property	0
Neighborly translational tessellations of the n-torus	0
When a word in Riordan involutions is a Riordan involution?	0
On a generalized notion of metrics	0
A Tverberg type theorem for staircase convexity	0
A note on convex solutions to an equation on open intervals	0
Maciej Sablik	0
A Pexider equation containing the aritmetic mean	0
Position of the centroid of a planar convex body	0
Cauchy product of iterative functional equation	0
A Levi–Civita functional equation on semigroups	0
A characterization of generalized multinomial coefficients related to the entropic chain rule	0
New constructions of t-norms and t-conorms on bounded lattices	0
Some construction approaches for t-norms and t-conorms on bounded lattices	0
Using Aichinger’s equation to characterize polynomial functions	0
Curves that allow the motion of a regular polygon	0
On when the union of two algebraic sets is algebraic	0
Additive maps on rank-s upper triangular matrices	0
Hlawka’s functional inequality almost everywhere	0
On restricted functional inequalities associated with quadratic functional equations	0
On graceful antimagic graphs	0
Arithmetic properties for generalized cubic partitions and overpartitions modulo a prime	0
Paired-domination game played on paths	0
The Hardy–Littlewood–Pólya inequality of majorization in the context of $$\mathbf {\omega }$$–$$\textbf{m}$$–star-convex functions	0
Vortex filament flows for curves in a 3-dimensional pseudo-Riemannian manifold	0
Generalized results on Levinson-type inequalities via Green functions and Fink’s identity	0
Distributivity of uni-nullnorms over semi-t-operators	0
Continuous selecting families and collectively fixed point theory	0
On optimal inequalities between three-point quadratures	0
On multiplicative functions which are additive on positive cubes	0
A majorization extension of Fenchel’s and Young’s results with a control map	0
On the Jensen convexity of quasideviation and Bajraktarević means	0
Visibility polynomials, dual visibility spectrum, and characterization of total mutual-visibility sets	0
Regular solutions of two alternative equations	0
The Goldie Equation: III. Homomorphisms from functional equations	0
Rotation number of 2-interval piecewise affine maps	0
Correction to: Regularity properties of k-Brjuno and Wilton functions	0
An explicit example of an iteration group in the ring of formal power series	0
Measuring movement of incomes and income mobility	0
Quantum dynamics of elliptic curves	0
Homi-repair under iteration (I): removable and jumping cases	0
Properties of Motzkin triangle and t-generalized Motzkin sequences	0
Solving linear functional inequalities with a computer	0
Rigidity of hypersurfaces and Moser–Bernstein type results in certain warped products, with applications to pseudo-hyperbolic spaces	0
Super-regular polytopes in cyclotomic hypercubes	0
Hyers–Ulam stability of integral equations with infinite delay	0
On symbolic computation of C.P. Okeke functional equations using Python programming language	0
Extending domains in the section method	0
On a polygonal mean value property	0
Iterated rascal triangles	0
On spectral irregularity of graphs	0
$$\varepsilon $$-isometries in $$l^n_1$$	0
Plenty of hyperbolicity on a class of linear homogeneous jerk differential equations	0
On quadrature means	0
The 58th International Symposium on Functional Equations Bilesdungshaus Grillhof, Innsbruck (Austria), June 19–26, 2022 Dedicated to the memory of János Aczél, founder of the Symposia	0