A graphical rendering of a Partially Ordered Set displayed via the Cover relation of the Partially Ordered Set with an implied upward orientation. A point is drawn for each element of the Poset, and line segments are drawn between these points according to the following two rules:

- 1. If in the poset, then the point corresponding to appears lower in the drawing than the point corresponding to .
- 2. The line segment between the points corresponding to any two elements and of the poset is included in the drawing Iff covers or covers .

© 1996-9

1999-05-25