#NEWLINE# def backward_cpu( self , x , gy ) : #NEWLINE# #INDENT# gx = gy [ 0 ] . copy ( ) #NEWLINE# neg_indices = ( x [ 0 ] < 0 ) #NEWLINE# gx [ neg_indices ] *= ( self . alpha * numpy . exp ( x [ 0 ] [ neg_indices ] ) ) #NEWLINE# return ( gx , )