Related terms:
gt
null
node
root
edges
empty
subtree
pairs
graph
stack
depth
visit
vertex
postorder
parent
traversal
inverse
each node
transitive
parent node
relation
binary tree
partial order
antisymmetric
algorithms
vector space
expression
if and only if
data structure
transitive relation
Wikipedia sources:
Tree traversal
Depth-first search
Binary tree
Transitive relation
The Glass Passenger
Partially ordered set
Topological space
Context for words:
preorder
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