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Mathematics
Mathematics
Problem
For the set
A
=
{
1
,
2
,
3
,
4
}
A=\{1,2,3,4\}
A
=
{
1
,
2
,
3
,
4
}
, define a relation
R
R
R
on
A
A
A
by
R
=
{
(
a
,
b
)
∣
a
<
b
and
a
+
b
is even
}
.
R=\{(a,b)\mid a<b \text{ and } a+b \text{ is even}\}.
R
=
{(
a
,
b
)
∣
a
<
b
and
a
+
b
is even
}
.
List all ordered pairs of
R
R
R
.
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