Alfred Kleiner (April 24, 1849 <unk> July 3, 1916) bụ onye Switzerland bụ ọkà mmụta ahụike na Prọfesọ nke Physics Experimental na Mahadum nke Zurich. Ọ bụ onye ndụmọdụ doctoral Albert Einstein ma ọ bụ Doktorvater. Onye ndụmọdụ Einstein bụ Heinrich F. Weber. Otú ọ dị, ha nwere nnukwu ọdịda, Einstein họọrọ ịgbanwee gaa Kleiner. Ajụjụ: mgbe a mụrụ Alfred kleiner?
(Eprel 24, 1849