Write the set representation of R, and remove all first.
Discrete relation
(1) element is represented by "circle";
(2) If x≤y, then Y is drawn on the upper layer of X;
(3) if y covers x, connect;
(4) You can draw incomparable elements on the same layer.
For example, draw a Haas diagram of the following relationship.
P={ 1，2，3，4}，& ltp，≤& gt； Hastu
A = {2,3,6,12,24,36}, < 1, separable > Hastu.
A={ 1, 2,3,5,6, 10,15,30}, < 1 > Hastu.