Is there a subtraction operation defined for infinities of the cardinality C?
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Okay simpler question: does the real line have an unbounded subset isomorphic to itself? Not just a dense subset
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More generally thinking about whether cardinality of "infinite games" in carse sense
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No that compares cardinality of reals vs countables. I'm after 2 uncountables
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i think your in the neighborhood of the continuum hypothesis en.wikipedia.org/wiki/Continuum

