Preorder (disambiguation)
Encyclopedia
A preorder
is a binary relation with certain properties. It can also mean:
In mathematics:
In marketing:
Preorder
In mathematics, especially in order theory, preorders are binary relations that are reflexive and transitive.For example, all partial orders and equivalence relations are preorders...
is a binary relation with certain properties. It can also mean:
In mathematics:
- A vertex ordering from a tree or other graph traversal; see Depth-first search#Vertex orderings
In marketing:
- Pre-orderPre-orderA pre-order is an order placed for an item which has not yet been released. The idea for pre-orders came when people found it hard to get popular items in stores due to their popularity. Companies were then given the idea to allow people to reserve their own personal copy, before the release, ...
– an order placed for an item which has not yet been released.