Lattice theory also grew out of this work. In addition to his work on logic he wrote an important article Über iterierte Functionen (1871) often cited as a basis of modern dynamical systems theory.
Bukod sa kanyang trabaho sa lohika wrote siya ng isang mahalagang artikulo Über iterierte Functionen (1871) madalas na nabanggit bilang isang batayan ng makabagong dynamical sistema ng teorya.