... in a plane. These variablesmay be regarded as the respective distances of N from the three sides of a triangle of reference. Then the equations of three lines in the plane may bewritten a 11x1+ ... fxnxn, A TREATISE ON THE THEORY OF INVARIANTS OLIVER E. GLENN, PH.D.PROFESSOR OF MATHEMATICS IN THE UNIVERSITY OF PENNSYLVANIACONTENTS 74.2.3 Difference between a transvectant and one of its terms. ... relation such as (45) above, k, the power of the modulus in the relation, shall be c alled the index of the concomitant. The numbers i, ω arerespectively the degree and the order of C.2.2.1 Definition.Let...