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- Dorian Popa, Ioan Rasa
- Applied Mathematics and Computation
- 2012

- Heiner Gonska, Ioan Raşa
- 2009

The present note discusses various quantitative forms of Vor-vonovskaya's 1932 result dealing with the asymptotic behavior of the classical Bernstein operators. In particular the relationship between a result of Sikkema and van der Meer and an alternative approach of the authors ist discussed. 41A36 In a recent paper [4] the well-known theorem of… (More)

- Ana Maria Acu, Ioan Rasa
- Numerical Algorithms
- 2016

Using Taylor’s formula some inequalities for a positive linear functional are considered in this paper. These results lead us to new estimates of the differences of certain positive linear operators. Applications for some known positive linear operators are given.

- Ioan Rasa
- Applied Mathematics and Computation
- 2015

- Anca Ciurte, Sergiu Nedevschi, Ioan Rasa
- Numerical Algorithms
- 2014

We consider nonlinear algebraic systems of the form F ( x ) = Ax + p , x ∈ ℝ + n $F(x)= Ax+p, x\in \mathbb {R}^{n}_{+}$ , where A is a positive matrix and p a non-negative vector. They are involved quite naturally in many applications. For such systems we prove that a positive solution x ∗ exists and is unique. Moreover, we prove that x ∗ is an attraction… (More)

- Tuncer Acar, Ali Aral, Ioan Rasa
- Applied Mathematics and Computation
- 2014

- Kinga Marton, Mihai Homan, Alin Suciu, Ioan Rasa
- 2013 RoEduNet International Conference 12th…
- 2013

The number of application areas of random number sequences is constantly increasing, but the desired quality of randomness may and do differ from one application domain to another. This is the reason why there is no single perfect random number generator for every application. Hence the selection of a generator has to rely on a thorough analysis of the… (More)

- Anca Ciurte, Sergiu Nedevschi, Ioan Rasa
- 2013 IEEE 9th International Conference on…
- 2013

Nowadays nuclear imaging is increasingly used for non-invasive diagnosis. The image modalities in nuclear imaging suffer of worse statistics, in comparison with computed tomography, since they are based on emission transition tomography. Thus, precise reconstruction methods that can deal with incomplete or missing measurements are needed in order to improve… (More)

- Daniela Inoan, Ioan Rasa
- Numerical Algorithms
- 2012

The Bernstein operators of second kind were introduced by Paolo Soardi in 1990, in terms of a random walk on a certain hypergroup. They have the same relation with Chebyshev polynomials of second kind as the classical Bernstein operators have with Chebyshev polynomials of first kind. In this paper we describe a de Casteljau type algorithm for these… (More)

- Dorian Popa, Ioan Rasa
- Journal of Approximation Theory
- 2012