523 



The absolute terms for the determination of A are, 



x' m = ^(b m -b' m ), when n-m is even, 

 and = -k(b m + b' m ), when n m is odd. 



y' m = -|( m + a' m ), when n-m is even, 

 and = ?(a m a' m ), when n m is odd. 



z' m = -J (& m + b' m ), when n m is even, 

 and %(b m b' m )> when n m is odd. 



The meaning and the formation of these expressions is given in 

 Section VIII. 



662 



