- Dettagli della rivista
- Formato
- Rivista
- eISSN
- 1584-3289
- Pubblicato per la prima volta
- 30 Jul 2019
- Periodo di pubblicazione
- 2 volte all'anno
- Lingue
- Inglese

#### Cerca

Accesso libero

#### Differences of classical and modified operators

Pagine: 3 - 12

#### Astratto

We are concerned with a family of Markov operators and some modifications of them. Differences involving such operators are studied. We compare their Voronovskaya formulas and determine the limits of their iterates.

#### Parole chiave

- positive linear operators
- differences
- iterates

#### MSC 2010

- 41A36

Accesso libero

#### Epanechnikov-exponential distribution: properties and applications

Pagine: 13 - 29

#### Astratto

A new continuous distribution is proposed using Epanechnikov kernel function and the exponential distribution. This distribution is called the Epanechnikov-exponential distribution. Some properties of this distribution are studied. A simulation study is conducted to calculate the mean and the standard deviation of this distribution and to investigate the behavior of MLE to conserve the consistency property. An application to a real data set is conducted, it showed that he new distribution is more flexible than the exponential distribution.

#### Parole chiave

- Epanechnikov exponential distribution
- Epanechnikov distribution
- Moments
- Skewness
- Kurtosis
- Entropy
- Order statistics
- quantile function

#### MSC 2010

- 62-XX
- 62Exx

Accesso libero

#### A general common fixed point theorem for a pair of mappings in S - metric spaces

Pagine: 31 - 39

#### Astratto

The purpose of this paper is to prove a common fixed point theorem for a pair of mappings satisfying an implicit relation, generalizing the main results from [6], [10], [11], [13] and other papers.

#### Parole chiave

- fixed point
- - metric space
- pair of mappings
- implicit relation

#### MSC 2010

- 54H25
- 47H10

Accesso libero

#### Coefficient estimates for a subclass of bi-univalent functions involving the q -derivatives operator

Pagine: 41 - 54

#### Astratto

In this current study, we introduce and investigate a new subclass of holormorphic and bi-univalent functions 𝕰 ^{η,ϕ}_{q}_{2}| and |_{3}| on the new subclass are obtained and important results are indicated.

#### Parole chiave

- Analytic functions
- -Derivative
- Bi-Univalent functions
- Coefficient estimates

#### MSC 2010

- Primary 30C45
- Secondary 30C50

Accesso libero

#### Ruled surfaces obtained by curves in the lightlike cone

Pagine: 55 - 61

#### Astratto

In this paper, we consider the ruled surfaces obtained the lightlike curve in the 2-dimensional lightlike cone according to the frame given in [7]. We obtain necessary and sufficient conditions for the ruled surfaces to be minimal and to have a harmonic Gauss map. Then we see that the ruled surface is minimal if and only if it has a harmonic Gauss map.

#### Parole chiave

- Ruled surfaces
- harmonic Gauss map
- lightlike cone

#### MSC 2010

- 53C30
- 53C52

Accesso libero

N -soliton solutions for a (3+1)-dimensional nonlinear evolution equation

Pagine: 63 - 77

#### Astratto

Via Hirota bilinear method and perturbation technique, a more general

#### Parole chiave

- (3+1)-dimensional nonlinear evolution equation
- Bilinear form
- -soliton solution
- Wronskian form

#### MSC 2010

- 35C07
- 35C08
- 35G20

Accesso libero

#### A unique common fixed point for a family of set-valued mappings

Pagine: 79 - 94

#### Astratto

The main purpose of this paper is to establish some common fixed point theorems for single and set-valued mappings, under strict contractive conditions with no continuity, no completeness, no inclusions and without using neither compactness nor closeness. These theorems improve the results of Fisher [8], Ahmed [1] and [2], and others. Also, common fixed point theorems for two hybrid pairs satisfying a contractive condition of integral type are given improving the results of [3], [4] and [6].

#### Parole chiave

- -compatible (resp. weakly compatible
- strictly subweakly -compatible
- reciprocally continuous
- strictly subreciprocally continuous ) single and set-valued mappings
- common fixed points

#### MSC 2010

- 47H10
- 54H25

Accesso libero

#### Iterative methods for extended general variational inequalities

Pagine: 95 - 102

#### Astratto

In this paper, we suggest and analyze a new approximation schemes (3) to solve the extended general variational inequalities (2), which were introduced by Muhammad Aslam Noor (see[7, 9]). Using the projection operator technique, we establish the equivalence between the extended general variational inequalities and the fixed-point problem. This equivalent formulation is used to discuss the existence of a solution of the extended general variational inequalities. Several special cases are also discussed.

#### Parole chiave

- Variational inequalities
- Projection operator
- convergence

#### MSC 2010

- 47J20
- 46E20
- 54A20

Accesso libero

#### Horadam polynomials and their applications to a certain family of bi-univalent functions defined by Wanas operator

Pagine: 103 - 119

#### Astratto

In this article, by making use of Horadam polynomials, we introduce and investigate a certain family 𝔗_{Σ} (λ, α, β,

#### Parole chiave

- Bi-univalent function
- Horadam polynomials
- Upper Bounds
- Fekete-Szegö problem
- Wanas operator

#### MSC 2010

- Primary 30C45
- Secondary 30C50

Accesso libero

#### The modified Bernstein-Stancu operators

Pagine: 121 - 128

#### Astratto

This paper is dealing with a class of operators fixing exponential functions. We study its convergence and an asymptotic formula is obtained. Finally, a comparison is stated, that shows that in a certain particular cases the new sequence approximates better than the classical ones.

#### Parole chiave

- positive linear operators
- Bernstein operators
- Bernstein-Stancu operators

#### MSC 2010

- 41A25
- 41A36