Abstract We will study evolution algebras A that are free modules of dimension two over domains. start by making some general considerations about domains: They sandwiched between a certain essential D -submodule and its scalar extension the field fractions domain. introduce notion quasiperfect we characterize perfect in terms determinant structure matrix. classify two-dimensional domains param...

although the genome is defined by its primary sequence, its functional properties, are determined by far more complex mechanisms and depend on multiple layers of nuclear organization. the architecture of the nucleus includes two overlapping structures: the chromatin and a framework structure named the nuclear matrix. ultra-structural studies reveal that the nuclear matrix is a network consistin...

The nuclear matrix i s involved in the processing of the genetic information and in the organization of chromatin. In recent years we have come to appreciate the organization of functional domains within the nucleus (e .g . , transcript domains, RNA processing s i tes , s i tes of replication). The nuclear matrix is the foundation from which this organization is built, providing a scaffold upon...

In this paper the degree of approximation function f, which is periodic with respect to hexagon lattice by matrix means T(A)n(f) its hexagonal Fourier series in generalized H?lder metric, where A a lower triangular infinite nonnegative real numbers nonincreasing row estimated.

We show that the first author’s QRB-domains coincide with Li and Xu’s QFS-domains, and also with Lawson-compact quasi-continuous dcpos, with stably-compact locally finitary compact spaces, with sober QFSspaces, and with sober QRB-spaces. The first three coincidences were discovered independently by Lawson and Xi. The equivalence with sober QFS-spaces is then applied to give a novel, direct proo...