I have written a function to calculate the Runge-Kutta numerical approximation of the differential equation dy/dt = -2ty^2 w/ initial conditions y(0)=1 from t=0 to t=10. The function worked when I ...

In this article, we study some new characterizations of primitive recursive functions based on restricted forms of primitive recursion, improving the pioneering work of R. M. Robinson and M. D.