This is the fifth of eleven Letters of Euler I will rewrite and post on the subject of infinitesimals (the infinitely small), an idea that is fundamental to a good understanding of calculus. Click here to read the previous letter. Letter XI. Reflections on Divisibility in infinitum, and on Monads. In speaking of the divisibility of body, we must carefully … Continue reading Letters of Euler to a German Princess, Vol. II, Letter XI