In article
<
8008c8fa-b772-4cd9...@d8g2000yqj.googlegroups.com>,
If countably many rationals can have an uncountable relative compliment
in [0,1], the why cannot your countably many intervals also have an
uncountable relative compliment?
Since the Cantor set does it, you must PROVE rather than merely assume,
as you have been doing, that your construction cannot do the same.
>
> > What a strange world you live in.
>
> Strange is only that you do not understand such an easy matter.
When I see that something like the Cantor set can have countably many
open intervals in [0,1] and still have an uncountable relative
compliment, I do not trust your construction to act differently without
seeing a proof that it acts as differently.
So far WM has provided no such proof, so that I declare that his claimed
result is not yet proven,
> >
> >
> >
> > > > If any two or more of them have a point in common then their union is
> > > > also an interval,
> >
> > > Of course. But by that process the number of intervals of the
> > > complement cannot increase but only decrease. Because between two
> > > overlapping intervals, there is no space for an uncovered irrational
> > > number.
> >
> > If the number of those intervals, I_n, �is infinite, as it is, then
> > unioning them when they overlap each other does not necessarily decrease
> > the 'number' of intervals,
>
> Who expects that? The number cannot increase. Only that is required
> for my proof, because we start with two countable sets. Important is
> that we never arrive at an uncountable subset.
WM starts with one countable set, the rationals, and creates other
countable sets from them without ever proving that what is not included
within his countable sets is also countable.
Since the Cantor set shows that one can remove countably many intervals
from [0,1] and still leave uncountably many points in place, WM is
obligated to prove that that cannot happen in his case.
Wm has yet to prove any such thing.
Therefore his claims are NOT established as having to occuranywhere
outsinde of his WMytheology.
>
>
> > which can, and must, remain equally infinite.
> > And, unless WM claims to cover all of [0,1] with intervals of cumulative
> > length 1/9, such unions must leave at least 8/9 of the interval [0,1]
> > uncovered.
>
> Initially the complete interval [0, 1] is covered by the countable
> sets of alternating intervals A_k and B_j. As my proof shows, this
> situation does never change.
Originally WM only had intervals I_n, of length 10^(-n), one for each
rational. Where did those A_k and B_j come from?
> >
> >
> >
> > > > Such a connected union of intervals I shall call a cluster.
> > > > Every rational point must be a member of some cluster.
> >
> > > Maybe. No problem. Clusters do not increase the number of possible
> > > places for uncovered irrationals.
> >
> > But if the set of such clusters, ordered by their positions on the real
> > line, is dense, WM's claims all go down the tubes.
>
> There is no if and when. Initially and finally the the complete
> interval [0, 1] is covered by the countable sets of alternating
> intervals A_k and B_j.
Where do these come from? If one set, say the A_k's is derived from the
original I_n's as "clusters", then there is nothing to show that they
are not densely ordered, that between any two of them there could be
another.
In which case, just like in the Cantor set, the compliment may be
uncountable.
>
> > We can then replace
> > each cluster by one of its irrational points and those, together with
> > the uncovered irrational points becomes an ordered set like a real
> > interval of length >= 8/9 (order-isomorphic to such a set).
>
> If there is a contradictory result, you either should be able to show
> an error in my construction or accept that the notion of countability
> is nonsense.
I show that you have not proved you claims and that you have made claims
for which the Cantor set is a counter-example, Thus your claims have not
yet been established
>
> Or perhaps there is another lurker who can point out the "first error"
> in my proof.
In your original "proof", you claimed that your set of clusters was
consecutively rather than densely ordered, i.e., that for every cluster,
except possible end clusters, there was a next larger and a next smaller
cluster, but this is obviously nonsense as it would limit things to
finitely many clusters.
What you never have been able to disprove is the possibility that the
set of clusters is densely ordered, so that between any two clusters
there are other clusters, which, like with the densely ordered rationals
would leave space for uncountably many uncovered irrationals.
Once again WM makes claims but fails to provide satisfactory proofs of
them. At least not satisfactory outside of his WMytheology!
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