Aequationes Mathematicae

Article	Citations
n-gon centers and central lines	39
On a combinatorial identity of Gavrea and Ivan and related results	33
A note on the four color theorem	28
Hyers-Ulam stability of a general linear partial differential equation	20
Report of Meeting Aczél100 Hotel Aurum, Hajdúszoboszló (Hungary), February 2–7, 2025	15
Packing squares into a rectangle with a relatively small area	14
Balanced Stirling numbers	12
On a family of analytic diassociative loops	9
Casting light on integer compositions	7
The best Ulam constant of a first-order linear differential operator	7
Bases consisting of self-referential functions in Banach spaces	6
Orthogonality induced by norm derivatives: a new geometric constant and symmetry	6
Continuous selections and collectively fixed point theory with applications to generalized games	6
A class of functional equations for additive functions	5
Regular polygons on isochordal-viewed hedgehogs	5
Equalities for mixed operations of Moore–Penrose and group inverses of a matrix	5
Vector-valued invariant means	5
A generalization of the cosine addition law on semigroups	5
Recent progress on minimal hypersurfaces with cylindrical tangent cones	5
Difference-differential fields of continuous functions	4
Discrete Time-dependent wave equations II. Semiclassical Fractional Klein-Gordon equation	4
Weakly associative functions and means - new examples and open questions	4
Functional equations stemming from ‘scientific laws’	4
Adjacencies for recognition of digital Jordan surfaces	4
Comparability of Metrics and Norms in terms of Basis of Exponential Vector Space	4

Regularity properties of k-Brjuno and Wilton functions	4
On an equality of means and a characterization of the logarithmic mean	4
Matrix inequalities between $$f(A)\sigma f(B)$$ and $$A\sigma B$$	4
Correction to: There is at most one continuous invariant 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
Continuous dependence of the weak limit of iterates of some random-valued vector functions	4
Extreme area and perimeter bisectors in a triangle	4
Dimension preserving approximation	3
Characterization of affine differences and related forms	3
On q-generalized (r, s)-Stirling numbers	3
A new equation related to two-sided centralizers in prime rings	3
On iterative roots of injective functions	3
On multiadditive set-valued maps “modulo K”	3
A generalization of the Kannappan-sine addition law on semigroups	3
Additive operators approximately preserving Birkhoff–James orthogonality	3
Randomly r-orthogonal factorizations in bipartite graphs	3
A functional equation related to Wigner’s theorem	3
A study on Davison’s functional equation for set-valued functions	3
Invariance problems of generalized weighted classical means	3
Global asymptotic stability of one time-continuous model and its time-discrete variant for basic virus dynamics	3
Further results on positively homogeneous subadditive functions by using Csiszár f-divergence	3
Explicit forms of invariant means: complementary results to Gauss $$\left( {\mathcal {A}},{\mathcal {G}}\right) $$-theorem and some applications	3
Regular solutions of a functional equation derived from the invariance problem of Matkowski means	3
Uniformly-like convex solutions for the polynomial-like iterative equation in Banach spaces	3
On some linear functional equations with continuous solutions	3
László Székelyhidi	3
A note on homotopy extension KKM type maps	2
Characterizations of weighted generalized inverses	2
On two functional equations of finite order and their complex-valued solutions with prescribed asymptotics	2
On digital sequences associated with Pascal’s triangle	2
A symmetric function approach to polynomial regression	2
A note on second differences in product form in two variables	2
Solutions to the operator equation $$f(XX^*)=g(X^*X)$$	2
On the Li–Zheng theorem	2
Zero utility principles coinciding on binary risks	2
A Kannappan-sine subtraction law on semigroups	2
Skew Dyck paths with air pockets	2
Odd strength spherical designs attaining the Fazekas–Levenshtein bound for covering and universal minima of potentials	2
Some investigations on the U-partial order induced by uninorms	2
Bisector fields and pencils of conics	2
A tribute to János Aczél	2
Stability of $$\varepsilon $$-isometries and their symmetrizations on the positive cones of $$c_0$$	2
On metric stability of set-valued subadditive functions	2
An Application of Viscosity Approximation Type Iterative Method in the Generation of Mandelbrot and Julia Fractals	2
On certain composite functional equations associated with the Dirichlet function	2
More results on the signed double Roman k-domination in graphs	2
Extensions of the sine addition law with an extra term	2
Extending EP matrices by means of recent generalized inverses	2
On an alternative additive-quadratic functional equation	2

A characterization of the Euclidean ball via antipodal points	2
General hyperstability criteria for Jensen-type equations	2
The values of zeta functions composed by the Hurwitz and periodic zeta functions at integers	2
A method to find any solution of $$f(p(x)) = q(f(x))$$ with given strictly increasing continuous real functions p, q	2
Global asymptotic stability of one time-continuous and two time-discrete models for ethanol metabolism in the human body	2
Some explicit values of a q-multiple t-function at roots of unity	2
Operators with a non-trivial closed invariant affine subspace	2
New generalizations of Steffensen’s inequality by Lidstone’s polynomial	2
Some new minimax inequalities for centered convex bodies	2
On the equality problem of two-variable Bajraktarević means under first-order differentiability assumptions	2
A classification of non-monotonicity height for piecewise monotone functions (I): increasing case	2
On strongly m-convex stochastic processes	2
Angular structure of equiangular cones in Euclidean spaces	2
On surface of Apollonius of two ellipsoids	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
Pexider invariance equation for embeddable mean-type mappings	2
Sparse groups need not be semisparse	2
Proof of a conjecture due to Chu on Gosper-type sums	2
Characterization of the Bernoulli polynomials via the Raabe functional equation	1
Some sufficient conditions for path-factor uniform graphs	1
On Jensen’s inequality involving divided differences of convex functions	1
On the maximal part in unrefinable partitions of triangular numbers	1
The Artin-Hasse series and Laguerre polynomials modulo a prime	1
Alienation of Drygas’, Cauchy’s, Jensen’s and the quadratic equations on semigroups with an involutive automorphism	1
On and around the balanced Cauchy equation	1
Exponential semi-polynomials and their characterization on semigroups	1
Some characterizations of the disc by properties of isoptic triangles	1
Max and min phase-isometries on the unit sphere of $$\ell _p(\Gamma )$$-type spaces for $$p>0$$	1
Characterizations of Lipschitz functions via the commutators of fractional maximal function in total Morrey spaces on stratified Lie groups	1
Local P-th Mean Stability of Scalar SDEs with Infinite Memory By Contraction Mapping Principle on Weak Banach Spaces	1
Constructing Ricci vector fields on $${\mathbb {R}}^2$$ with a diagonal metric	1
On the $${A_{\!\mathbb {C}}}$$-rank of multidigraphs	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
On monohedral tilings of a regular polygon	1
Mountain-climbing constructions for piecewise monotone functions	1
On conditions determining formal automorphisms of integro-differential operators	1
Quaternion-valued multiplicative functions on semigroups	1
d-Young distance function and existence of fixed points in complete metric spaces	1
Sorting 1-away permutations with underlying Fibonacci convolutions	1
Computer assisted investigation of alienness of linear functional equations	1
Elephant polynomials	1
Complex ellipsoids and complex symmetry	1
Block-Toeplitz Operators On the Hardy Space Induced by a Tracial Unital Banach $$*$$-Probability Space	1
A two-vertex theorem for normal tilings	1
The isoperimetric problem for hyperideal polyhedra, part II	1
The isoperimetric problem for hyperideal polyhedra, part I	1
Characterizing spanning trees via the size or the spectral radius of graphs	1
Note on the variance of generalized random polygons	1
The d-distance p-packing domination number: complexity, cycles, and trees	1
On composition and Right Distributive Law for formal power series of multiple variables	1
Another approach to K-subadditivity	1
On the critical exponents of generalized ballot sequences in three dimensions and large tandem walks	1
On distance spectral radius of graphs with given number of pendant paths of fixed length	1
On the functional equation $$\hbox {f}(\hbox {x}+\hbox {y})=\hbox {g}(\hbox {xy})$$	1
On a variant of Tingley’s problem for $$\ell ^p(\Gamma , H)$$ spaces for $$p\in [1, \infty ]$$	1
Distributivity and conditional distributivity of bi-uninorms over uninorms	1
Darboux and shift-compactness paradigms: Automatic continuity in the Gołąb-Schinzel and the Goldie equations	1
Quadratic functions fulfilling an additional condition along the hyperbola $$\pmb {xy = 1} $$	1
Functional equations, alternating expansions, and generalizations of the Salem functions	1
Independent mutual-visibility coloring and related concepts	1
Continuous solutions of a system of composite functional equations	1
Set-valued dynamics related to convex-valued m-mappings	1
Generalized orthogonality equations in normed spaces	1
Report of Meeting The 61st International Symposium on Functional Equations, Cluj-Napoca (Romania), June 15–21, 2025	1
Refinements of discrete and integral Jensen inequalities with Jensen’s gap	1
On polyhedral graphs and their complements	1
A method for determining the mod-$$p^k$$ behaviour of recursive sequences	1
Discrete time scales with two quanta and Ulam stability	1
Spanning subgraphs and spectral radius in graphs	1
Correction: On two functional equations of finite order and their complex-valued solutions with prescribed asymptotics	1
On some classes of multiplicative functions	1
About Sobolev spaces on fractals: fractal gradians and Laplacians	1
Another look at the Matkowski and Wesołowski problem yielding a new class of solutions	1
Transitive quasi-uniform structures depending on a parameter	1
A Novel Three-Step Fixed-Point Iteration Scheme for Robust Solutions Finding and Applications	1
Vector valued invariant means, complementability and almost constrained subspaces	1
Maker-Breaker resolving game played on corona products of graphs	1
On evolutes of curves in the isotropic plane	1
Hyers-Ulam stability of an  iterative  equation  for  strictly increasing continuous functions	1
The monomial functional equation for connected Lie groups	1

Isometry groups of six-dimensional nilmanifolds	1
Angular structure of Reuleaux cones	1
The minmin coalition number in graphs	1
Weakly contractive in mean random-valued functions and two linear functional equations	1
Finite dimensional varieties over the Heisenberg group	1
Sections and projections of nested convex bodies	1
Poncelet Pairs via Isogonal Conjugacy	1
$$C_{2}$$-cyclic means	1
Points of monotonicity in F-normed Orlicz function spaces	1
On sets related to integer partitions with quasi-required elements and disallowed elements	1
A generalization of a theorem of von Neumann	1
Clique trees with a given zero forcing number maximizing the $$A_\alpha $$-spectral radius	1
Inequalities characterizing differential operators	1
Mathematical models of functional extreme leaning machins: operator-algebraic and free-probabilistic approaches	1
On centrality of solutions of generalized addition and subtraction laws	1
Enumeration of labeled connected bipartite graphs with given Betti number	1
Graceful Antimagic Injection via Combinatorial Nullstellensatz	1
Some study of the approximate Birkhoff orthogonality and orthogonality of bounded linear operators	1
Convex Meir-Keeler-Ćirić-Matkowski contractive mappings and their application to functional equation arising in the behavioral study of paradise fish and predator-prey models on the Lipschitz spaces	1
Prefixes of bargraph paths	1
Refinements of Jensen’s inequality by uniformly convex functions	1
Overpartitions in terms of 2-adic valuation	1