It was his teacher Harnischmacher who first gave Killing his love of mathematics; later he expressed his admiration for Harnischmacher when he dedicated his thesis to him.
Ito ay ang kanyang guro Harnischmacher na unang ibinigay pagpatay sa kanyang pag-ibig ng matematika; mamaya siya nagpahayag sa kanyang admiration para sa Harnischmacher kapag nag-alay siya ng kanyang tesis sa kanya.