398 MR. A. E. FORSYTE ON INVARIANTS, COVARIANTS, AND QUOTIENT- 



- 



f 4 f 1 



( + 5) 



- e 



'+ 3) ^ 



+ 5 (n + 4) ^P 3 + | (3n + 7) /*'P 8 } - A (n + 1) e/. TiU . 



21. We now proceed to construct the functions 4 , 5 , fi , @ 7 ; the value of 3 has 

 ahready ( 13) been found, and may be taken in the form 



;'V<i+..>f-i'M- e,= P s -|. ;:^-'-.-^-:'/ . (H) 



Calculation of the Invariants 3 , <s> 4 , @ 5 , 6 , 7 . 



22. The invariant 4 . 



The most general form possible is 



and the invariantive equation is 



0,( a; ) = ^ 

 = (1 



