A relation R on a set A is defined to be irreflexive if, and only if, for every  x ∈ A,  x R x; asymmetric if, and only if, for every  x, y ∈ A  if  x R y  then y R x; intransitive if, and only if, for every  x, y,   z ∈ A,  if  x R y  and  y R z  then x R z. Let  A = {0, 1, 2, 3},  and define a relation  R4  on A as follows. R4 = (1, 2), (2, 1), (1, 3), (3, 1) Is  R4  irreflexive, asymmetric, intransitive, or none of these? R4 is irreflexive.R4 is asymmetric.R4 is intransitive.R4 is neither irreflexive, asymmetric, nor intransitive.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.7: Relations
Problem 24E: For any relation on the nonempty set, the inverse of is the relation defined by if and only if ....
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A relation R on a set A is defined to be
  • irreflexive if, and only if, for every 
    x ∈ A,
     x R x;
  • asymmetric if, and only if, for every 
    x, y ∈ A
     if 
    x R y
     then y R x;
  • intransitive if, and only if, for every 
    x, y,
     
    z ∈ A,
     if 
    x R y
     and 
    y R z
     then x R z.
Let 
A = {0, 1, 2, 3},
 and define a relation 
R4
 on A as follows.
R4 = (1, 2), (2, 1), (1, 3), (3, 1)
Is 
R4
 irreflexive, asymmetric, intransitive, or none of these?
R4 is irreflexive.R4 is asymmetric.R4 is intransitive.R4 is neither irreflexive, asymmetric, nor intransitive.
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