in this article, by using chebyshev’s polynomials and chebyshev’s expansion, we obtain the best uniform polynomial approximation out of p2n to a class of rational functions of the form (ax2+c)-1 on any non symmetric interval [d,e]. using the obtained approximation, we provide the best uniform polynomial approximation to a class of rational functions of the form (ax2+bx+c)-1 for both cases b2-4a...

We study the Monge-Ampere operator $u \mapsto (\text{dd}^c u)^n$ and compare it with Dinh-Sibony's intersection product defined via density currents. show that if $u$ is a plurisubharmonic function belonging to Blocki-Cegrell class, then Dinh-Sibony $n$-fold self-product of $\text{dd}^c u$ exists coincides $(\text{dd}^c u)^n$.

In this paper, we revisit a procedure for constructing peak functions devised by Bishop. Specifically, let Ω be a bounded domain in R (or C), and let E be a closed subspace of C(Ω) : the class of all complex-valued functions that are continuous on Ω. Let x ∈ Ω; we say that f (here f ∈ E) peaks at x if f(x) = 1 and |f(y)| < 1 ∀y ∈ Ω \ {x}, and we call f a peak function of class E. We present a p...

In the model plant Arabidopsis thaliana, a core eudicot, the floral homeotic C-class gene AGAMOUS (AG) has a dual role specifying reproductive organ identity and floral meristem determinacy. We conduct a functional analysis of the putative AG ortholog ThtAG1 from the ranunculid Thalictrum thalictroides, a representative of the sister lineage to all other eudicots. Down-regulation of ThtAG1 by v...

introduction: bone marrow transplantation is a good therapeutic modality for beta thalassemia. liver complications are one of the major causes of morbidity and mortality following bmt. determination of the factors of liver injury leads to earlier  diagnosis after bmt and improves prognosis. method: we studied 113 major beta thalassemic patients who have been transplanted from 1990- 2000 in bone...

The B-class genes APETALA3 (AP3) and PISTILLATA (PI) in Arabidopsis (Arabidopsis thaliana) and their orthologs in other species have been the focus of studies to elucidate the development of petals and stamens in angiosperm flowers. Evolutionary analysis indicates that B-class genes have undergone multiple gene duplication events in angiosperms. The resultant B-class lineages are characterized ...