Give is a set of disjoint circles of radius $1$ on the plane. Is this set countable ? I don't think so. In my opinion, the set with only one circle with radius 1in the plane is also uncountable, isn't it?
2026-03-27 23:37:54.1774654674
Set of disjoint circles of radius $1$ on the plane countable?
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The hint:
Inside any circle we can take a rational point. It's one to one and ...