Note that on the surface the and that the outward normal makes with is acute, on it is obtuse and on it is . Hence, above becomes
This proves . Similarly, using the special nature of and projecting it on -plane and -plane, respectively, equations and can be proved. This proves the divergence theorem for special regions.
): 
the and 
that the outward normal 
makes with 
is acute, on 
it is obtuse and on 
it is 
. Hence, above becomes 
. Similarly, using the special nature of 
and projecting it on 
-plane and 
-plane, respectively, equations 
and 
can be proved. This proves the divergence theorem for special regions. 
