This paper investigates the approach of presenting groups by generators and relations from an original angle. It starts by interpreting this familiar concept wi
It has been shown that the first principle of thermodynamics follows from the conservation laws for energy and linear momentum. And the second principle of ther
Duality behavior of photons in wave-particle property has posed challenges and opportunities to discover other frontiers of fundamental particles leading to the
We study a series-parallel repairable system consisting of three units with multiple vacations of a repairman. We first show that all points on the imaginary ax