Many studies have been carned out concermng parametnc programming of the objective function coefficients and also the parametnc programming of the constant terms of the constraints has been extensively studied However, many authors state that parametnc programming of éléments of the matrix coefficients is simple and useful only when the coefficients that vary correspond to nonbasic vee tors, an...

Assuming that each subjet follows the Yonetoku relation, i.e., E rest p ∝ L 1/2 p , we performed Monte Carlo simulations in the context of a multiple subjet model (or inhomogeneous jet model) for gamma-ray bursts (GRBs), X-ray–rich GRBs (XRRs), and X-ray flashes (XRFs). For a single subjet, we found that E rest p ∝ Eiso 0.4 for large viewing angle. For the multiple subjet model under the univer...

We have read with interest the paper by Baste and colleagues [1] describing an anterior technique to dissect subcarinal nodes after left-sided video-assisted thoracic surgery (VATS) lobectomy. The main points of their paper are the following: (1) complete nodal dissection is recommended even in early staged non–small cell lung cancer (NSCLC), to guarantee the most accurate staging; and (2) to b...

Mathematical modeling is a standard approach to solve many real-world problems and diversity of solutions an important issue, emerging in applying obtained from mathematical models problems. Many studies have been devoted finding diverse solutions. Baste et al. (Algorithms 2019, IJCAI 2020) recently initiated the study computing combinatorial perspective fixed-parameter tractability. They consi...

We perform Monte Carlo simulations to study Ep–Eiso correlation in the context of a multiple subjet model (or inhomogeneous jet model) for gamma-ray bursts (GRBs), X-ray–rich GRBs (XRRs), and X-ray flashes (XRFs). For a single subjet, we find that Ep ∝ Eiso for large viewing angles. For the multiple subjet model in which all the subjets have the same intrinsic properties, off-axis events show E...

¿Quién es el Divino Rostro? Si respondemos que es, al mismo tiempo, una máscara y un personaje de danza en Texcoco o cueva ubicada volcán Popocatépetl y, además, rayo, la tierra, dueño del monte, fractalizado cinco cerros sagrados poniente valle México, necesitaríamos espacio más amplio ya generosamente nos han cedido los editores Iberoforum para explicar con suficiencia nuestras respuestas. Ba...