here i have four odes
diff(x(t),t)=f(x,y,z,w); diff(y(t),t)=g(x,y,z,w);diff(z(t),t)=h(x,y,z,w); diff(w(t),t)=k(x,y,z,w)
whrer f,g,h and k are known nonlinear functions? Then how can i get the graph of (x,y)near some point,eg (0,0), by the numeric method? Thank you very much!
