246 



branch-point B t = 



V 27 



UNIVERSITY OF COLORADO STUDIES 



2 



in the z-plane. The easiest way to plot this 



curve is to give u different values and then solve for v. In order to follow 



2 

 the motion of the w's, when z describes the line x = —= , (bcdB I 



F27 



jgh), Fig. 4, 1 or conversely, the motion of z when w describes the curve 



K 



'WU 



Fig. 4 



(5), assume, in accordance with (5), a set of values u, v (assume the 

 m's and calculate the z/'s according to the formula. 



1 



u 3 —u+- 



I/27 



3 U 



Putting u = —7= , where m denotes an integer, 



v - ±l A 



m 2 -\ 7. , 



3 > m 



1 Taken from Durege, loc. cit. 



