Trees

A Tree $T$ is a Graph that:


trees.png

Trees can be

  • Ranked or Unranked
  • Ordered or Unordered


Ranked Trees

A tree is ranked if you know in advance how many children a node has

A tree is unranked if you don't know in advance the number of children


Ordered Trees

A tree is ordered if the order of children matters

For example,

  • trees-order.png

Sources

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