Math Problem Statement

Given any partially-ordered set (S,⪯) , it is known that a standard Hasse diagram can be constructed representing the relation ⪯ on the vertex set with vertices labelled by the elements of S . Gabriel wants to compare the Hasse diagram for a partially-ordered set with the standard arrow diagram for the relation ⪯ on S , which we might refer to as the unsimplified diagram for (S,⪯) . (a) Consider the set S={1,2,4,5,6,8,10,12,18} . How many edges are in the standard Hasse diagram for the partially-ordered set (S,∣) and How many edges are in the unsimplified diagram for (S,∣) ? Include the Hasse diagram in your answer.

Solution

Here is the Hasse diagram for the set S={1,2,4,5,6,8,10,12,18}S = \{1, 2, 4, 5, 6, 8, 10, 12, 18\} with the partial order defined by divisibility:

  • Number of edges in the Hasse diagram: 11
  • Number of edges in the unsimplified diagram: 17

Do you have any questions or would you like more details?

Relative Questions:

  1. How does the Hasse diagram change if we remove or add an element to the set SS?
  2. What is the significance of transitive reduction in the context of Hasse diagrams?
  3. How would the Hasse diagram differ if the relation was defined differently, such as a less-than-or-equal relation?
  4. What are some common applications of Hasse diagrams in mathematics and computer science?
  5. How does the complexity of constructing a Hasse diagram scale with larger sets?

Tip: When constructing Hasse diagrams, always check for transitive relations to minimize the number of edges.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Partially-ordered sets
Hasse diagrams
Divisibility relation

Formulas

-

Theorems

-

Suitable Grade Level

Advanced Mathematics