ÖFVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1 901, N:0 9. 707 



If X denotes the positive or negative unity these both rela- 

 tions can be combined into the one 



Tf 



Hence we finally obtain by means of (65) 



/9j(^) = arctg 



zt 



R^Ari 



+ 2m7tT:E^^-M. (67) 



From the formula (67) innumberable relations can be de- 

 rived by using properties of the jE'-function. 

 From (1) we get 



Iritjf 



R^Aj'A + 



1 ** 



R~^Ari'^'' 



The important question to determine the maxima and min- 

 ima of the function T{t) we do not treat here. 



