The origin and development of the fundamental theorem of projective geometry (1915)
Farver, Emery C · leaf 70
he resulting prcjectivity isthe same provided the order i s the sam,e. iTom this it follows thatthree pairs of corresponding elem.ents and their order of correspon-dence uniquely determ-ine the one-to-one cci respondencc of ;^i:ojectiveform.s. The uniqueness of this proof is also shown in the fact… … Fig. 2 ILATE 2
