This function is an early example of an automorphic function and in this work Schwarz was looking at ideas which led Klein and Poincaré to develop the theory of automorphic functions.
Function na ito ay isang maagang halimbawa ng isang automorphic function na ito at sa trabaho Schwarz ay naghahanap sa mga ideya na humantong Klein at Poincaré upang bumuo ng teorya ng automorphic function.