Recent content by amr07

Hi Everybody I am beginner in c++ and I need your help please. I implemented euler method for solving simple ODEs (y' = x -y, y(0)=1)and it is forward in time(from t=0 to t=1) and it worked well, my question is : I want to run this code backward in time(t=1 to t=0) what i have to change in my...

Dear HallsofIvy, many thanks for your helping. the second term in the fourth equation(for v') should be [1-sin^2]. so we have no also four differential equations. it seems easily but how i can get the solution? thanks again

thanks

Dear all, I have system(4 equations) of BVPs. Could anybody recommend me, how to solve this system(whatever numericaly or analytical): x'=-y/sqrt(x^2+y^2) + u y'=x/sqrt(x^2+y^2) + v u' = -xy/(x^2+y^2)^3/2 u - [1/sqrt(x^2+y^2) - x^2 /(x^2+y^2)^3/2] v v' = xy/(x^2+y^2)^3/2 v -...

Dear everybody, I am new here. I need your suggesstion and helping for solving the next nonlinear boundary value problem: x'=-y/sqrt(x^2+y^2) y'=x/sqrt(x^2+y^2) with x(0)=y(0)=-1 and x(pi/4)=y(pi/4)=1 so is it easy to get the analytical solution to the problem above or I have to solve this...