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S.B
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comment
Existence of a special type of maximal ideal in $C(X)$:
consider the intersection of all such sets ({infinity} union (N-{n}))
comment
Existence of a special type of maximal ideal in $C(X)$:
{infinity} is a G-delta set.
asked
Existence of a special type of maximal ideal in $C(X)$:
comment
Is this space discrete?
X-Z(f) is an open set.
comment
Is this space discrete?
I do not unterstand how {x}=cl(X-Z(f)) implies X- Z(f)={x}.
awarded
 Informed
awarded
 Editor
revised
Is this space discrete?
added 2 characters in body
asked
Is this space discrete?