def simplify_presentation(C):
 rels = C._reidemeister_relators
 rels_arr = _simplification_technique_1(rels)
 group = C._schreier_free_group
 C._reidemeister_relators = [group.dtype(tuple(r)).identity_cyclic_reduction() for r in rels_arr if r]

def simplify_presentation ( C ) : rels = C . _reidemeister_relators rels_arr = _simplification_technique_1 ( rels ) group = C . _schreier_free_group C . _reidemeister_relators = [ group . dtype ( tuple ( r ) ) . identity_cyclic_reduction ( ) for r in rels_arr if r ]
relies upon _simplification_technique_1 for its functioning .