Gragg-Bulirsch-Stoer Method for Pc

1. The Gragg-Bulirsch-Stoer method for approximating the solution of the differential equation y'(x) = f(x,y) with initial condition y = c when x = x0 is a variable step method which uses Graggs modified midpoint method for a given step size h to evaluate y(x+h), a rational function or polynomial approximation to the limit as h -> 0, and an algorithm to estimate the error based on successive estimates to y(x+h) and adjust the step size so that the absolute error is within a preassigned tolerance.

2. In numerical analysis, the Gragg-Bulirsch–Stoer algorithm is a method for the numerical solution of ordinary differential equations.

3. Three graph choices display the results for the Estimate, Exact and Error Vectors The graphs are touch enabled graph.

4. The value returned is y1 which is the is the value of y evaluated at x + h, h_new is the predicted step size so that the accuracy is maintained.

5. The procedure terminates when the absolute difference of two successive extrapolated scaled estimates of the solution are less than epsilon.

6. The Gragg-Bulirsch-Stoer App solves the differential equation y'=f(x,y) with the initial condition y=y0 at x.

7. Upon touching the graph a vertical line appears.

8. The vertical y-axis plots a range of Pr(x) values.

9. The horizontal x-axis displays x values.

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