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Mathematics
Mathematics
Problem
Explain why the relation
S
=
{
(
x
,
y
)
∈
R
×
R
:
x
2
+
y
2
=
1
}
S = \{(x,y) \in \mathbb{R} \times \mathbb{R} : x^2 + y^2 = 1\}
S
=
{(
x
,
y
)
∈
R
×
R
:
x
2
+
y
2
=
1
}
is not a function from
R
\mathbb{R}
R
to
R
\mathbb{R}
R
.
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