I am surprised that there is no mentioning of the famous "milkmaid problem", which is the best intuitive example, in my opinion; for that, see http://www.slimy.com/~steuard/teaching/tutorials/Lagrange.ht....
I am surprised that there is no mentioning of the famous "milkmaid problem", which is the best intuitive example, in my opinion; for that, see http://www.slimy.com/~steuard/teaching/tutorials/Lagrange.ht....