[prev] 26 [next]

Minimum Spanning Trees (cont)

Simplifying assumptions:
  • edges in G are not directed   (MST for digraphs is harder)
  • no edge weights are negative
  • all edge weights are distinct
If edges may have same weight:
  • MST may not be unique   (not necessarily a problem)
  • if we have to choose between edges with same weight ...
    • greedy algorithms might make wrong choice
    • might not end up with minimum cost solution