If a relation is an equivalence relation, state the set of equivalence classes.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Exercise 2: Relations Decide if the following relations are reflexive, symmetric or transitive.
If a relation is an equivalence relation, state the set of equivalence classes.
1. Let X = P({1, 2, 3}). On X we define the relation for A, B E X: We say that
A~ B if and only if A has the same number of elements as B.
2. R := {(x, y) = R² : x - y| <2}, where x - y is the absolute value as defined
in the lecture.
3. Let f: RR, x→ sin(x). We define the relation ~ for x, y E R via
x~y: f(x) = f(y),.
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