def dmp_normal(f, u, K):
 if (not u):
  return dup_normal(f, K)
 v = (u - 1)
 return dmp_strip([dmp_normal(c, v, K) for c in f], u)

def dmp_normal ( f , u , K ) : if ( not u ) : return dup_normal ( f , K ) v = ( u - 1 ) return dmp_strip ( [ dmp_normal ( c , v , K ) for c in f ] , u )
normalize a multivariate polynomial in the given domain .