def dmp_zeros(n, u, K):
 if (not n):
  return []
 if (u < 0):
  return ([K.zero] * n)
 else:
  return [dmp_zero(u) for i in range(n)]

def dmp_zeros ( n , u , K ) : if ( not n ) : return [ ] if ( u < 0 ) : return ( [ K . zero ] * n ) else : return [ dmp_zero ( u ) for i in range ( n ) ]
return a list of multivariate zeros .