The relation on Z × N defined by, (a, b) ~ (c, d) if ad bc.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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HW#9

In problems 4 and 5, demonstrate that the relation described is (1) reflexive, (2) symmetric, and (3) transitive; thus, confirming it as an equivalence relation. (4) Illustrate this by sketching the underlying set as a subset of the plane, and color each equivalence class differently.
Transcribed Image Text:In problems 4 and 5, demonstrate that the relation described is (1) reflexive, (2) symmetric, and (3) transitive; thus, confirming it as an equivalence relation. (4) Illustrate this by sketching the underlying set as a subset of the plane, and color each equivalence class differently.
5. The relation ∼ on ℤ × ℕ is defined by (a, b) ∼ (c, d) if ad = bc.
Transcribed Image Text:5. The relation ∼ on ℤ × ℕ is defined by (a, b) ∼ (c, d) if ad = bc.
Expert Solution
Step 1

The objective is to show that the relation a,b~c,d then ad=bc is an equivalence relation.

To show that any relation is equivalent then,

It is enough to show that

(1) reflexive

(2) transitive

(3) symmetric

The reflection is symmetric since,

a,a~(a,a) then a2=a2

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