The theory of differential equations has been widely known and developed in recent years. One the issues that many authors give their undivided attention to is stability boundary nonlinear dynamical systems. In this work, we first review several properties equilibrium points on boundary. We next extend characteristics for a fairly large class These are key completely determine

The waste heat management becomes very important with increasing energy demand and limited fossil resources. Here, we demonstrate thermoelectric performance of allotropic TeSe2. Based on the first-principle calculations, confirm energetic kinetic stability five TeSe2 allotropes. We predict δ-TeSe2 as a new direct band gap semiconductor having 1.60 eV gap. All allotropes exhibit in UV–Vis region...