#NEWLINE# def _eval_rewrite_as_Si( self , z ) : #NEWLINE# #INDENT# return ( ( ( Ci ( ( I * log ( z ) ) ) - ( I * Si ( ( I * log ( z ) ) ) ) ) - ( S . Half * ( log ( ( S . One / log ( z ) ) ) - log ( log ( z ) ) ) ) ) - log ( ( I * log ( z ) ) ) )