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60.882  Articles
1 of 6.089 pages  |  10  records  |  more records»
We introduce some linear positive operators of the Szasz-Mirakjan type in the weighted spaces of continuous functions in two variables. We study the degree of the approximation of functions by these operators. The similar results for functions in one vari... see more

We show that (generalized) effect algebras may be suitable very simple and natural algebraic structures for sets of (unbounded) positive self-adjoint linear operators densely defined on an infinite-dimensional complex Hilbert space. In these cases the eff... see more

The goal of this paper is to show that the positive polarity behavior of plain disjunctions (e.g., French ou ‘or’) can be analyzed as an interplay between a semantic requirement for obligatory exhaustification and an economy condition which prevents vacuo... see more

We obtain integral representations for positive definite functions of one variable, when kernels K(x,y)K(x,y) are positive definite. The proof is based on the spectral theory of differential operators of fourth order.

The goal of this paper is to show that the positive polarity behavior of plain disjunctions (e.g., French ou ‘or’) can be analyzed as an interplay between a semantic requirement for obligatory exhaustification and an economy condition which prevents vacuo... see more

On approximation of two-variable function by linear positive polynomial operators.

Given a non-zero polynomial f in a polynomial ring R with coefficients in a finite field of prime characteristic p, we present an algorithm to compute a differential operator d which raises 1/ f to its pth power. For some specific families of polynomials,... see more

In this paper, the Riemann-Liouville fractional operator is used to generate new classes of integral inequalities using a family of n positive functions, (n ? N*). For our results, some interesting classical inequalities can be deduced as some special cas... see more

In this paper, we introduce some new subclasses of multivalent analytic functions in the unit disc E, and investigate a number of inclusion relationships, radius problem,  and some other interesting properties of p-valent functions which are defined ... see more

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