Prufer code is reversible 1-1 every(1,v2,,m-2)∈{1,2，.，n}n-2 is decodable to a tree > onto Cayley's formula: There are n"-2 trees on n distinct vertices.Prüfer code is reversible 1-1 every (v1, v2,...,vn￾2) ￾ {1, 2,...,n}n￾2 is decodable to a tree onto There are nn￾2 trees on n distinct vertices. Cayley’s formula: