0th Order Equations 



dp 

 dz 



1st Order Equations 



with 



p — 



dt 



+ Vp^^' 



' + P* 



i'V0= 







^1' 



dt 



dz 



= 







y-V'^ 



= 









a.<l> = - 



" dt 



it z = 









dt 



(18) 



with 



p = const at 2 = 0. (19) 



(20) 



(21) 



(22) 



(23) 



p(l) _ ^-(1) JL = at 2 = (24) 



ii'^^' = at 2 = H (25) 



2nd Order Equations 



Vp'2)^p(2)^^_^p(i>^^-7i).^-(i)\ (26) 



^'^'+,,(2)^ _71).y (1) (27) 



dt dz 



V-u'"' =0 (28) 



12 



