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In Memorium: Aleksandar Ivić (March 6, 1949 – December 27, 2020)
(Beograd : Académie Serbe des sciences et des arts, 2021)
Eminent scientist Aleksandar Sanja Ivić, Full Member of the Serbian Academy of Sciences and Arts (SANU), passed away on December 27, 2020, after a vicious illness he faced with an unprecedented will, but unfortunately he ...
Two Perov type generalized graph contractions
(Beograd : Académie Serbe des sciences et des arts, 2021)
In [Priblizˇ. Metod. Resˇen. Differencial’. Uravnen. 2 (1964), 115 − 134]
A. I. Perov generalized the Banach contraction principle by employing matrices instead of
contraction constants. In this paper, we introduce and ...
Boundary values, integral transforms, and growth of vector valued Hardy functions
(Beograd : Académie Serbe des sciences et des arts, 2021)
Banach space valued Hardy functions Hp, 0 < p ≤ ∞, are defined
with the functions having domain in tubes T C = Rn + iC ⊂ Cn; H2 functions with values
in Hilbert space are characterized as Fourier-Laplace transforms of ...
Miscellaneous formulae for the certain class of combinatorial sums
(Beograd : Académie Serbe des sciences et des arts, 2021)
In a recent paper [Montes Taurus J. Pure Appl. Math. 3 (1) (2021), 38–61]
we defined the class of combinatorial sums.
The purpose of this paper is to give some integral formulas, identities and combinatorial
sums using ...
The legacy of Aleksandar Ivic
(Beograd : Académie Serbe des sciences et des arts, 2021)
The research and expositive writing of Aleksandar Ivić on analytic number
theory is surveyed with an emphasis of his contributions to the theory of Riemann’s zeta-function.
The Ahlfors-Schwarz lemma, curvature, distance and distortion
(Beograd : Académie Serbe des sciences et des arts, 2020)
In this paper, we consider versions of the Ahlfors-Schwarz lemma related
to ultrahyperbolic metric, quasiconformal harmonic and holomorphic functions (including
several dimensions versions) and harmonic mappings. Our ...
On hypercyclicity and supercyclicity of strongly continuous semigroups induced by semiflows. Disjoint hypercyclic semigroups
(Beograd : Académie Serbe des sciences et des arts, 2020)
We enquire into the basic structural properties of positively supercyclic
strongly continuous semigroups induced by locally Lipschitz continuous semiflows in the setting of weighted Lp and C0-type spaces. We also introduce ...
Bounded linear and compact operators between the Hahn space and spaces of strongly summable and bounded sequences
(Beograd : Académie Serbe des sciences et des arts, 2020)
We establish the characterisations of the classes of bounded linear operators from the generalised Hahn sequence space hd, where d is an unbounded monotone
increasing sequence of positive real numbers, into the spaces ...
Sombor index – one year later
(Beograd : Académie Serbe des sciences et des arts, 2020)
The Sombor index (SO) is a vertex–degree–based graph invariant, invented
in the Summer of 2020, and made publicly available in early 2021. In less than one year, a
remarkable number (almost fifty) research papers on this ...
A note on sharpening of the Erdo˝s-Lax inequality concerning polynomials
(Beograd : Académie Serbe des sciences et des arts, 2020)
In this paper, we establish some upper bound estimates for the modulus of
the derivative of a polynomial on the unit disk while taking into account the placement of the
zeros and the extremal coefficients of the polynomial. ...