The polygons sorted concave of data ( m, ) m greater than n, n greater or equal to two or 40, m, r, r ) m greater than r, r greater than or equal to two, are a special case of the polygons sorted data 40 concave; m, r, n ) m greater than r, r greater than n, n greater or equal to one, and therefore relationships that occur in it are those that occur in the polygons sorted data concave ( m, ) or ( m, r, r ) replacing n by r and vice versa.