A study on fractional mathematical model for cancer chemotherapy using the residual power series method

In the present study, we develop classical and fractional-order mathematical models for cancer chemotherapy. The model is represented by a system of fractional differential equations with a Caputo fractional derivative consisting of the normal, effector, immune-response, tumour cells, and chemotherapeutic drug. The local and global stability of the model are examined, and the existence and uniqueness criteria of the solutions for the stable model are also discussed. The semi-analytical solution of the model is obtained in the form of a convergent series using the residual power series method. The behaviour of normal, effector, immune-response, tumour cells, and chemotherapeutic drug amounts for distinct fractional orders is also obtained. Additionally, the parametric sensitivity analysis for the model is discussed.