where V ¯ {\displaystyle {\bar {V}}} denotes an average velocity during t 2 − t 1 {\displaystyle t_{2}-t_{1}} , we can derive V ¯ {\displaystyle {\bar {V}}} from equations (27) and (28) by a simple process of iteration.
S. Chandrasekhar
denotes an average velocity during 
, we can derive from equations (27) and (28) by a simple process of iteration.
