40 
whenever y>/J(e), which is, by definition, 
D Db 
iim Jr: y) ax = [pee y)ax 
Y CO Uae 
a a 
This result can be generalized to higher dimensions by 
repeated application of the above theorem. Since Hexp(j6) 
= Feos6+ j#sin§ and each function satisfies the condition of 
the theorem, and since integration is a linear process, 
the claim of Part I, Section 2(b) is seen to be true. 
