Le Matematiche (Dipartimento di Matematica e Informatica, Università degli Studi di Catania)
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Subordination properties for a certain class of analytic functions with complex order
Get PDFIn this paper, we derive several subordination results for a certain class of analytic functions defined by the generalized Al-Oboudi differential operator. Relevant connections of some of the results obtained with those in earlier works are also provided
Certain subclasses of analytic functions with varying arguments
Get PDFIn this paper, we introduce new classes VM(β ) and VN(β ) of analytic functions with varying arguments in the open unit disc U = {z ∈ C : |z| <1}. Some properties such as coefficient estimates, extreme points, distortion theorems for functions f (z) belonging to the classes are obtained
Computing GA_{5} index of armchair polyhex nanotube
Get PDFThe fifth geometric-arithmetic index of a graph is defined to be GA_5(G). This index was introduced by A. Graovac et al. in 2011. In this paper, we give explicit formulas for the fifth geometric-arithmetic index of a family of Hexagonal Nanotubes namely: Armchair Polyhex Nanotubes
Subclass of harmonic starlike functions associated with salagean derivative
Get PDFThe purpose of the present paper is to establish some results involving coefficient conditions, distortion bounds, extreme points, convolution, and convex combinations for a new class of harmonic univalent functions in the open unit disc \ associated with the Salagean operator. We also discuss a class preserving integral operator. Relevant connections of the results presented here with various known results are briefly indicated
On Pták functions for bounded operators
No full textThe purpose of this paper is to prove that if the Pták function p is an operator norm, on \mathcal{B}(E), associated to a norm | . |, then (E, | . |) is a pseudo-Hilbert space. As a consequence, we obtain that if \mathcal{B}(E) is a C*-algebra, then E is a Hilbert space
Classification of binary systematic codes of small defect
Get PDFIn this paper non-trivial non-linear binary systematic AMDS codes are classified in terms of their weight distributions, employing only elementary techniques. In particular, we show that their length and minimum distance completely determine the weight distribution
Common fixed point theorems of compatible mapping of type (P) in intuitionistic fuzzy metric spaces
Get PDFThe aim of this paper is to point out results of M. Koireng and Yumnam Rahen [8] on compatible mappings of type (P) in fuzzy metric spaces into intuitionistic fuzzy metric spaces with same terminology and notations
Bornological Locally Convex Cones
Get PDFIn this paper we define bornological and b-bornological cones and investigate their properties. We give some characterization for these cones. In the special case of locally convex topological vector space both these concepts reduce to the known concept of bornological spaces. We introduce and investigate the convex quasiuniform structures U_{tau}, U_{sigma}(P,P*) and \U_{beta}(P,P*) on locally convex cone (P,U)
A look at proximinal and Chebyshev sets in Banach spaces
Get PDFThe main aim of this survey is to present some classical as well asrecent characterizations involving the notion of proximinal and Chebyshev sets inBanach spaces. In particular, we discuss the convexity of Chebyshev sets
Unified representation of a certain class of harmonic univalent functions defined by Dziok-Srivastava operator
Get PDFIn this paper, we investigate several properties of the harmonic class defined by the modified Dziok-Sirvastava operator, obtain distortion theorem, extreme points, convolution condition, convex combinations and integral operator for this class. Some of our results generalize previously known results