# convert to y(n,x), derivative holder;


toyn(a_=b_):=toyn(a)=toyn(b);
toyn(ds(y,x_,n_)) := y(n,x);
toyn(ds(y)):=y(1,x);
toyn(d(y(x_),x_)):=y(1,x);
toyn(d(y(x_),x_,p_)):=y(p,x);
toyn(integrate(y(x_),x_)):=y(-1,x);
toyn(integrates(y,x_)):=y(-1,x);
toyn(integrate((x_-t_)^n_*y(t_),t_,0,x_)):=y(n,x);
toyn(integrates((x_-t_)^n_*y(t_),t_,0,x_)):=y(n,x);
toyn(integrates((x_-t_)^n_*y,t_,0,x_)):=y(n,x);
toyn(integrate(y(t_),t_,a_,x_)):=y(-1,x);
toyn(integrates(y,t_,a_,x_)):=y(-1,x);