If I'm understanding you correctly, there is something wrong here. The continuum C is the set of real numbers, and the hypothesis is that C is À1. The question is whether there is some endless set between ¥ and C to which À1 would correspond. If there is such a set, then it would be À1, and C might be À2.
There are actually two (related) continuum hypotheses out there; one is simply the contiuum hypothesis, that
À1 = C, and the other one is called the generalized continuum hypothesis, which says that x
Àn =
Àn+1 for all finite x. I was referring to the generalized one here, since the other one immediately follows from that as a special case.
If you are asking me whether I think C is À1, I'd say it makes sense to me running on intuition. Removing any endless series of numbers from C, by whatever pattern, should produce two sets correspondent to ¥. How anything else could be true defies my imagination, but I cannot prove it, and neither, it seems, can any better minds.
Interesting; I personally think it actually should not be true. It has been proven that the transcendental numbers are what make up the continuum, since the algebraic numbers make up a
À0 set while the transcendentals are a
À1 set, which means that there are infinitely more transcendentals than algebraics. Unlike algebraics, transcendentals have not really been classified into more subgroups (i.e. integers, rationals, etc.), so it is quite possible that the
À1 cardinality of the continuum comes from several of these subgroups and not just one.
Um, is that a typo? C^C should give the set of functions on a two-dimensional plain, not just C again. I presume that that set of functions raised by itself gives the set of three dimensional functions, but I don't know.
ack...I actually meant
À1 = C there. It was 2 in the morning and I had only gotten five hours of sleep the previous night, so I probably made some errors...yeah, uh, that's my excuse!
![:D](https://www.hard-light.net/forums/Smileys/HLP/biggrin.gif)
Well, the big problem in this question is that N and S are not mutually exclusive at all; S is a subset of N. Thus they are not equinumerable, and never were claimed to be. S and -S will be (where -S is the set of naturals that are not squares of naturals), but N contains them both.
I also think that S should be only a subset of N, but apparently Cantor (the same guy who proposed the continuum hypothesis) proved that all sets of the same cardinality are equinumerable. This would mean that there are just as many squares, cubes or primes, etc. as natural numbers. This also implies that the set of points on any continuum is equal to that of any other continuum, so something like, say, a line segment of length 1 will have the same number of points as an infinite-dimensional cube with infinite edges. While this could well be true, I personally find the proof of it a bit dodgy, and the implications of it would be quite far-reaching; for example, all of analysis, one of the largest and most developed branches of pure mathematics, would be rendered completely meaningless, since all infinite sums and integrals would be equal.