The new link, connecting the vertices i and j, is a briรdge for the MSTm1. By the definition of bridรge, this statement implies that the vertices i and j are not connected via any path in MSTm. Therefore, by inductive hypothesis, the vertices i and j are not connected via any path also in Gm, and then the new link is a bridge for Gm1 too. In this case, both graphs will include the considered link, and then the statement is true at the step m + 1.