higher derivatives of implicit equation?

[parisse]

In the meantime, you can enter this program:

Code:


idiff(eq,x,y,n):=begin
  local j,dn,d1;
  d1:=-diff(eq,x)/diff(eq,y);
  dn:=d1;
  for j from 2 to n do
    dn:=diff(dn,x)+diff(dn,y)*d1;
  end;
  return dn;
end