## Automatic algorithm for monotone trend removal

AbstractThe available numerical algorithms for trend removal require a direct subjective intervention in choosing critical parameters. In this paper an…

## Deterministic components in the light curve amplitude of Y Oph

AbstractAbout two decades after the discovery of the amplitude decline of the light curve of the classical Cepheid Y Oph,…

## Biperiodic orbital period modulation of the W UMa binary system CK Bootis

AbstractA study of the orbital period variation of the W UMa system CK Bootis is made using an extended observational…

## Orbital period modulation of the eclipsing binary system ER Vulpeculae: Real or not?

AbstractThe reanalysis of the timing data of the binary system ER Vulpeculae revealed the superposition of a relatively slow increasing…

## Detection of low level periodic signals through enhanced self-correlation method. The case of ER Vulpeculae

AbstractThe self-correlation (SC) method proposed three decades ago by Percy, Jakate and Matthews is a complementary time series analysis method…

## On an Aitken-Steffensen-Newton type method

Abstract We consider an Aitken-Steffensen type method in which the nodes are controlled by Newton and two-step Newton iterations. We…

## A survey on the high convergence orders and computational convergence orders of sequences

Abstract Let $$x_k\rightarrow x^\ast\in{\mathbb R}^N$$; denote the errors by $$e_k: = \|x^\ast – x_k\|$$ and the quotient factors…

## FEM and/or BEM for numerical simulation of Marangoni flow

AbstractThe aim of this work is the numerical study of Marangoni effect using three different methods. They are a finite…

## Electrical Conductivity of Vitreous 75%V2O5−25%(As2O3·B2O3)

AbstractIn this note we present a study of semiconducting properties of vitreous 75%V2O5-25% which contains two glass former oxides namely…

## On the use of Green’s formula for the solution of the Navier-Stokes equations

AbstractA general iterative procedure for solving Navier-Stokes system in stream function-vorticity variables  is considered. Using the fundamental solution for Laplace…