Consider a linear diierential equation of some order n with coef-cients analytic in the unit disk. Assuming that the equation has a unique Fuchsian singular point at z = 0, and all roots of the corresponding indicial equation are real, we establsih an upper bound for the number of zeros of any solution of this equation in any sector with the vertex at z = 0. This upper bound is in some sense li...

We study static spherically symmetric solutions to the vacuum field equations of quadratic gravity in presence a cosmological constant $\Lambda$. Motivated by trace no-hair theorem, we assume Ricci scalar be throughout spacetime. Furthermore, employ conformal-to-Kundt metric ansatz that is valid for all spacetimes and leads considerable simplification equations. arrive at set two ordinary diffe...

Las tomas feministas en universidades chilenas 2018 supusieron un acontecimiento mediatizado que para los periódicos de referencia El Mercurio y La Tercera implicó una cobertura trasluce tensiones entre la voz enunciativa del periodismo como institución necesidad hacerse eco feminismo base, protagonista movimientos. Desde semiótica indicial reconoce textos objetos culturales, este estudio, basa...

We present an analytical method to describe the accommodative changes in the human crystalline lens. The method is based on the geometry-invariant lens model, in which the gradient-index (GRIN) iso-indicial contours are coupled to the external shape. This feature ensures that any given number of iso-indicial contours does not change with accommodation, which preserves the optical integrity of t...

An evaluation of computational models is carried out for flight dynamics simulations on low-speed aircraft with very-flexible high-aspect ratio wings. Structural dynamic models include displacement-based, strain-based, and intrinsic (first-order) geometrically-nonlinear composite beams, while thin-strip and vortex lattice methods are considered for the unsteady aerodynamics. It is first shown t...