code: def is_rewritable_or_comparable(sign, num, B):
      """
      Check if a labeled polynomial is redundant by checking if its
      signature and number imply rewritability or comparability.
  
      (sign, num) is comparable if there exists a labeled polynomial
      h in B, such that sign[1] (the index) is less than Sign(h)[1]
      and sign[0] is divisible by the leading monomial of h.
  
      (sign, num) is rewritable if there exists a labeled polynomial
      h in B, such thatsign[1] is equal to Sign(h)[1], num < Num(h)
      and sign[0] is divisible by Sign(h)[0].
      """
      for h in B:
          # comparable
          if sign[1] < Sign(h)[1]:
              if monomial_divides(Polyn(h).LM, sign[0]):
                  return True
  
          # rewritable
          if sign[1] == Sign(h)[1]:
              if num < Num(h):
                  if monomial_divides(Sign(h)[0], sign[0]):
                      return True
      return False
  
imports: from sympy.core.symbol import Dummy
  from sympy.polys.monomials import monomial_mul, monomial_lcm, monomial_divides, term_div
  from sympy.polys.orderings import lex
  from sympy.polys.polyerrors import DomainError
  from sympy.polys.polyconfig import query
label_desc: Use image node_id 20 for calling a global function with example usage: is_rewritable_or_comparable(sign, num, B) and returns: False, True, True