Hello,

i'm a math student and i do need help about the proof of Runge Kutta Method of 4th order. Especially i need information about how to find the terms k_{1}, k_{2}, k_{3}, k_{4.}There has to be explanations in the proof about four of them, step by step. Otherwise it is not useful for me . Wherever i check, there is such a note like "it is beyond us to show how these terms can be found but we'll explain a little bit". However this is not enough for me. Is there anyone who can help me about finding an advanced proof of 4th order Runge-Kutta?