CoNRAN — Some Theorems on the Twisted Cubic. 



261 



The equation of the hyperboloid containing the curve and having its 

 centre at the point is 



3P3 2A Pi 



P. 2F, 3Po 



d^d. - di' djiz - d^d^ did-i - d^ 



= 0, 



where P,. is the determinant obtained by omitting the elements a,-, h,., c,., dr 

 from the array 



X 



y 



z 



1 



a. 



K 



Co 



d. 



«i 



&> 



Ci 



d, 



ft, 



h 



Co 



d. 



a-i 



h 



C:j 



da 



E.I. A. PEOC, VOL. XXVII., SECT. A. 



[38] 



