def dmp_inject(f, u, K, front=False):
 (f, h) = (dmp_to_dict(f, u), {})
 v = (K.ngens - 1)
 for (f_monom, g) in f.items():
  g = g.to_dict()
  for (g_monom, c) in g.items():
   if front:
    h[(g_monom + f_monom)] = c
   else:
    h[(f_monom + g_monom)] = c
 w = ((u + v) + 1)
 return (dmp_from_dict(h, w, K.dom), w)

def dmp_inject ( f , u , K , front = False ) : ( f , h ) = ( dmp_to_dict ( f , u ) , { } ) v = ( K . ngens - 1 ) for ( f_monom , g ) in f . items ( ) : g = g . to_dict ( ) for ( g_monom , c ) in g . items ( ) : if front : h [ ( g_monom + f_monom ) ] = c else : h [ ( f_monom + g_monom ) ] = c w = ( ( u + v ) + 1 ) return ( dmp_from_dict ( h , w , K . dom ) , w )
convert f from k[x][y] to k[x .