- #1
cragar
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Homework Statement
If we have the open interval (0,1) my book says that there is no finite sub cover.
Homework Equations
[itex] A \subseteq \mathbb{R} [/itex] An open cover for A is a possibly infinite collection of open sets whose union contains the set.
The Attempt at a Solution
By why can't my subcover be [itex] (0,1/2) \bigcup (1/4,1) [/itex]
those are 2 open sets whose union is (0,1) and I have 2 sets.
Unless when they say finite sub cover they are talking about elements in the set.
I am probably missing something in the definition. Any help would be much appreciated.