In the present paper, we propose a new approach to investigate the logistic function, which is commonly used in mathematical models in economics and management. The approach is based on indicating in a given time series, having a logistic trend, some characteristic points corresponding to zeroes...

In this research work we apply the Homotopy Perturbation Method (HPM) to solve the Three-dimensional mathematical model of Novel Coronavirus differential equation, which is applied to investigate the transmittal dynamics Novel Coronavirus infection in public. We have got the solution which has...