At each level the nodes of a recombining tree are indexed from 1 to n (the number of tree nodes at this level), where 1 denotes the lowermost node and n denotes the uppermost node of the tree. The GetProbabilities command returns the list of transition probabilities for the node j at level i of the tree T. This command is related to the GetDescendants command in-as-much as the descendants  returned by GetDescendants and probabilities returned by GetProbabilities are ordered correspondingly.

Note that the transition probabilities can be set using the SetProbabilities command.

The Finance[GetProbabilities] command was introduced in Maple 15.

For more information on Maple 15 changes, see Updates in Maple 15.