IOO MATHEMATICAL FORMULAE AND ELLIPTIC FUNCTIONS 



5.03 The volume of an elementary parallelepipedon is : 



* 



5.04 coi, o> 2 , co 3 are the angles between the normals to the surface / 2 , / 3 ; / 3 ,/j; 

 /i, / 2 respectively: 



cos coi = 



COS C02 = 



cos co 3 = 



5.05 Orthogonal Curvilinear Coordinates. 



gi = gi = 3 = o, 

 du 2 dv* dw 2 



j 

 dr 



dv dw , dw du du dv 



r~7 ' (l"j v = j j > do w 

 Ihhz h z hi 



du dv dw 



5.06 hi 2 , h 2 2 , h are given by 5.00 (3) and also by: 



-WxW 



.) + (r,) + (s) 



