In the semileptonic decays of heavy mesons and baryons, lepton-mass dependence factors out in quadratic ${\mathrm{cos}}^{2}\ensuremath{\theta}$ coefficient differential $\mathrm{cos}\ensuremath{\theta}$ distribution. We call corresponding normalized convexity parameter. This observation opens path to a test lepton universality meson baryon that is independent form-factor effects. By projecting ...

Let A be a (not necessarily selfadjoint) subalgebra of a unital C-algebra B which contains the unit of B. The right ideals of A with left contractive approximate identity are characterized as those subspaces of A supported by the orthogonal complement of a closed projection in B which also lies in A. Although this seems quite natural, the nonselfadjointness requires us to develop some interpola...

Here, in this article, we investigate the solution of a general family fractional-order differential equations by using spectral Tau method sense Liouville–Caputo type fractional derivatives with linear functional argument. We use Chebyshev polynomials second kind to develop recurrence relation subjected certain initial condition. The behavior approximate series solutions are tabulated and plot...

in this paper the periodic solutions of fourth order delay differential equation of the form $ddddot{x}(t)+adddot{x}(t)+f(ddot{x}(t-tau(t)))+g(dot{x}(t-tau(t)))+h({x}(t-tau(t)))=p(t)$  is investigated. some new positive periodic criteria are given.

Let $X$ be an infinite set, equipped with a topology $tau$. In this paper we studied the relationship between $tau$, and ultrafilters on $X$. We can discovered, among other thing, some relations of the Robinson's compactness theorem, continuity and the separation axioms. It is important also, aspects of communication between mathematical concepts.

the aim of this note is to study the submajorization inequalities for $tau$-measurable operators in a semi-finite von neumann algebra on a hilbert space with a normal faithful semi-finite trace $tau$. the submajorization inequalities generalize some results due to zhang, furuichi and lin, etc..

the purpose of this paper is to obtain necessary and suffcient conditionsfor existence approximate fixed point on geraghty-contraction. in this paper,denitions of approximate -pair fixed point for two maps tα , sα and theirdiameters are given in a metric space.