OOIR: Observatory of International Research

Papers

(The TQCC of Aequationes Mathematicae is 1. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-04-01 to 2025-04-01.)

Article	Citations
On a functional equation on groups in two variables	45
Gromov hyperbolicity of Johnson and Kneser graphs	27
On the functional equation $$\hbox {f}(\hbox {x}+\hbox {y})=\hbox {g}(\hbox {xy})$$	24
Some moduli related to $$\rho _{\pm }$$-orthogonalities and semi-orthogonality in Banach spaces	14
A generalization of a theorem of von Neumann	13
The minmin coalition number in graphs	9
Homomorphisms from Functional Equations: The Goldie Equation, II	7
Sparse groups need not be semisparse	7
Skew Dyck paths with air pockets	6
Angular structure of equiangular cones in Euclidean spaces	5
Hyers-Ulam stability of a general linear partial differential equation	5
A note on the Radiant formula and its relations to the sliced Wasserstein distance	5
Refinements of Jensen’s inequality by uniformly convex functions	4
Non-existence of measurable solutions of certain functional equations via probabilistic approaches	4
K-subadditive and K-superadditive set-valued functions bounded on “large” sets	4
Note on generalized Archimedes–Borchardt algorithm	4
An orthogonality type based on invariant inner products	4
A Levi–Civita functional equation on semigroups	4
Fejér type inequalities for higher order convex functions and quadrature formulae	4
Sections in functional equations: stability and hyperstability	4
The solvability cardinal of the class of polynomials	4
Vector-valued Banach limits and the linear span property	4
On isoptics and isochordal-viewed curves	4
Kadec-Klee property in Musielak-Orlicz function spaces equipped with the Orlicz norm	4
Systems of functional equations and generalizations of certain functions	4

On the existence of m-norms in vector spaces over valued fields	3
Inequalities of Sherman type involving both $$h_1$$-convex and $$h_2$$-concave functions with applications	3
Polynomially EP operators	3
Certain density theorems applied to the embeddability of iteration semigroups	3
Packing squares into a rectangle with a relatively small area	3
n-gon centers and central lines	3
Moment functions and exponential monomials on commutative hypergroups	3
On metric stability of set-valued subadditive functions	3
On a combinatorial identity of Gavrea and Ivan and related results	3
On alienation of two functional equations of quadratic type	3
The cosine addition and subtraction formulas on non-abelian groups	2
Bisector fields and pencils of conics	2
Embedding euclidean distance graphs in $${\mathbb {R}}^n$$ and $${\mathbb {Q}}^n$$	2
An upper bound of the density for packing of congruent hyperballs in hyperbolic $$3-$$space	2
Set-valued dynamics related to convex-valued m-mappings	2
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	2
Odd strength spherical designs attaining the Fazekas–Levenshtein bound for covering and universal minima of potentials	2
Properties of Motzkin triangle and t-generalized Motzkin sequences	2
Deviation from equidistance for one-dimensional sequences	2
Homi-repair under iteration (II): oscillating discontinuities and pre-discontinuities	2
Balanced Stirling numbers	2
A Kannappan-sine subtraction law on semigroups	2
Pexider invariance equation for embeddable mean-type mappings	2
General hyperstability criteria for Jensen-type equations	2
On the variable-order fractional derivatives with respect to another function	2
Some new minimax inequalities for centered convex bodies	2
On the minimality of the Winterbottom shape	2
Some characterizations of the disc by properties of isoptic triangles	2
On digital sequences associated with Pascal’s triangle	2
A note on the four color theorem	2
Maciej Sablik	2
The monomial functional equation for connected Lie groups	2
Correction to: Kadec-Klee property in Musielak-Orlicz function spaces equipped with the Orlicz norm	2
On a multiplicative distribution of functions in complex plane	2
The Hardy–Littlewood–Pólya inequality of majorization in the context of $$\mathbf {\omega }$$–$$\textbf{m}$$–star-convex functions	2
On and around the balanced Cauchy equation	2
Semi-classical 2-dimensional Minkowski planes	2
On a family of matrix equalities that involve multiple products of generalized inverses	2
Remarks on Wright-convex functions	2
Well-posedness for a class of pseudo-differential hyperbolic equations on the torus	2
On a generalized notion of metrics	2
The Goldie Equation: III. Homomorphisms from functional equations	1
Two-sided delay-difference equations and evolution maps	1
Continuous selections and collectively fixed point theory with applications to generalized games	1
Twisted coefficients on coarse spaces and their corona	1
Transitive quasi-uniform structures depending on a parameter	1
A two-vertex theorem for normal tilings	1
Global forcing number for maximal matchings in corona products	1
Bases consisting of self-referential functions in Banach spaces	1
Generalized Vincze’s functional equations on any group in connection with the maximum functional equation	1

Rigidity of hypersurfaces and Moser–Bernstein type results in certain warped products, with applications to pseudo-hyperbolic spaces	1
Zero utility principles coinciding on binary risks	1
On the equality problem of two-variable Bajraktarević means under first-order differentiability assumptions	1
A note on the Choquet type operators	1
Casting light on integer compositions	1
On q-poly-Bernoulli numbers arising from combinatorial interpretations	1
Functional equations, alternating expansions, and generalizations of the Salem functions	1
A note on iterated maps of the unit sphere	1
Proof of a conjecture due to Chu on Gosper-type sums	1
Position of the centroid of a planar convex body	1
On multiplicative functions which are additive on positive cubes	1
Interview with Ludwig Reich	1
There is at most one continuous invariant mean	1
A class of functional equations for additive functions	1
On a class of functional difference equations: explicit solutions, asymptotic behavior and applications	1
A generalization of the cosine addition law on semigroups	1
Area computation for triangular area or perimeter bisecting deltoids	1
Sections and projections of nested convex bodies	1
Refining the Hermite-Hadamard inequalities for operator convex maps in multiple operator variables	1
A divided-difference characterization of polynomials over finite fields of characteristic two	1
Vector-valued invariant means	1
Numerical semigroups bounded by the translation of a plane monoid	1
On surface of Apollonius of two ellipsoids	1
Coincidence theory for lower semicontinuous type maps with decomposable values	1
Equalities for mixed operations of Moore–Penrose and group inverses of a matrix	1
General criteria for hyperstability of Cauchy-type equations	1
A note on convex solutions to an equation on open intervals	1
The equation $$\pmb {f(xy) = f(x)h(y) + g(x)f(y)}$$ and representations on $$\pmb {\mathbb {C}^2}$$	1
Complementary means with respect to a nonsymmetric invariant mean	1
Reduction formulas for higher order derivations and a hypergeometric identity	1
Partitions associated to class groups of imaginary quadratic number fields	1
Regular polygons on isochordal-viewed hedgehogs	1
Row-summable matrices with application to generalization of Schröder’s and Abel’s functional equations	1
Refinements of discrete and integral Jensen inequalities with Jensen’s gap	1
Recent progress on minimal hypersurfaces with cylindrical tangent cones	1
On the $${A_{\!\mathbb {C}}}$$-rank of multidigraphs	1
Another approach to K-subadditivity	1
Finite dimensional varieties over the Heisenberg group	1
Common positive solutions for two non-linear matrix equations using fixed point results in b-metric-like spaces	1
On graceful antimagic graphs	1
New inequalities related to superquadratic functions	1
Correction to: Regularity properties of k-Brjuno and Wilton functions	1
Orthogonality induced by norm derivatives: a new geometric constant and symmetry	1
On an alternative additive-quadratic functional equation	1
Set-valued solutions of a two-variable functional equation with involutions	1
A characterization of the Euclidean ball via antipodal points	1
Extensions of the sine addition law with an extra term	1
On the Li–Zheng theorem	1