text: Apparently Husserl and Heidegger had moved apart during the 1920s , which became clearer after 1928 when Husserl retired and Heidegger succeeded to his University chair .
simplified: Husserl also influenced Martin Heidegger , who was Husserl 's assistant , and who Husserl himself considered best suited as his successor until Heidegger started supporting the Nazi ideology . Heidegger 's magnum opus Being and Time is dedicated to Husserl .