I would like to ask connected with iteration, how I can to make sure that the iteration values in transient conditions are enough to reach to convergence solution. based on what? hence how I can to know the iteration values select is correct?
How many iterations for approximate solution to be very near or nearest to the exact solution (Convergence) is to be guess only. It varies and may be different for every function. Also which initial values could be good fit for fast convergence is not yet known., however much simplified approximate function for numerical values may be much better for faster commutation.
Please have a look at nonlinear probability distribution functions, Monte Carlo methods for nonlinear function approximation and iterative solutions ..... Please kindly see Numerical Partial Differential Equations ... with its approximate solutions, i.e., their convergence to the nearly exact solution....
https://www.springer.com/gp/book/9781402031212
Also kindly see : https://watermark.silverchair.comapplied science......
Also ... https://www.hindawi.com/journals/jam/2012/294086/