Take the close set of real [1,2], there are infinite numbers of infinite subsets

送交者: steven 于 2008-12-12, 01:44:37:

回答: 是我的问题ill-defined，还是你没读懂我的问题？由 xinlihuaxys 于 2008-12-12, 01:37:23:

and their cardinal don't all equal. Say: [1, 1/2, 1/3, 1/4...., 2] that is a infinite subset of the, so did you mean that? or [e^0, e^-1, e^-2...] how about that? that is a infinite subset of real numbers. You did not give the definition of the set, and of course, it is ill-defined.

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