In recent years, much attention has been paid to the study of forward and inverse problems for Rayleigh-Stokes equation in connection with importance this applications. This plays an important role, particular, behavior certain non-Newtonian fluids. The includes a fractional derivative order $$\alpha $$ , which is used describe viscoelastic flow. paper, we solution such equations depending on p...

The optical properties of monocrystalline, intrinsic silicon are interest for technological applications as well fundamental studies atom-surface interactions. For an enhanced understanding, it is great to explore analytic models which able fit the experimentally determined dielectric function $\epsilon(T_\Delta, \omega)$, over a wide range frequencies and temperature parameter $T_\Delta = (T-T...

we study connected orientable spacelike hypersurfaces $x:m^{n}rightarrowm_q^{n+1}(c)$, isometrically immersed into the riemannian or lorentzian space form of curvature $c=-1,0,1$, and index $q=0,1$, satisfying the condition $~l_kx=ax+b$,~ where $l_k$ is the $textit{linearized operator}$ of the $(k+1)$-th mean curvature $h_{k+1}$ of the hypersurface for a fixed integer $0leq k