In this paper, we study semi-analytical methods entitled Homotopy pertourbation method (HPM) to solve fuzzy impulsive fractional differential equations based on the concept of generalized Hukuhara differentiability. At the end first of Homotopy pertourbation method is defined and its properties are considered completely. Then econvergence theorem for the solution are proved and we will show tha...

The development of artificial intelligence and the recent COVID-19 pandemic as well emergence other diseases has led to dramatic changes in overall supply chain development. choice a suitable supplier will be key ensuring sustainable company normal operation chain. However, evaluation data selection contains both qualitative quantitative simultaneously. In addition, information provided by expe...

In this paper a Vertex Covering Obnoxious Facility Location model on a Plane has been designed with a combination of three interacting criteria as follows: 1) Minimize the overall importance of the various existing facility points; 2) Maximize the minimum distance from the facility to be located to the existing facility points; 3) Maximize the number of existing facility points covered. Area re...