“…As the crux of RPSM is differentiation of an infinite (multiple) power series (since differentiation is relatively an easier task than integration) along with the advantages of no linearization/transformation, no discretization/round-off errors, and direct application to the given problem by choosing approximation value/function. These features make RPSM as the method of choice for a wider class of ODE and PDE problems of mathematical and physical sciences (Dubey et al, 2019;Kumar et al, 2016aKumar et al, , 2017Kumar et al, , 2016bAlquran et al, 2020;Haq and Hussain, 2018).…”