Originally posted by Organic
Left-right or right-left diagonals holds only for finite P(n).
When I deal with P(aleph0) ordered list then you can see that it is
a right-left diagonal.
It is no problem to say that ...111111 is also in the list but then
we clearly deal with a finite ordered list, which is not our case.
Again, be aware to the fact that we are dealing with an ordered collection.
Also ...111111 is not just a one member but an open interval of aleph0 scales (of 2^aleph0 ordered collection).
So, we should looka t the diagonal from top right to the 'bottom left'.
the scales thing is not important - ...1111 corresponds to the element in the power set that is the set N.
That doesn't answer anything important anyway.
The thing you construct is a doubly infinite array from right to left and top to bottom, it contains only strings with a finite number of non-zero elements as I've proved independently of you and as you prove yourself by writing an explicit bijection with 2-adic expansions.
Clearly the list is countable (nb, for mathematicians, lists are countable by definition), yet you insist that it contains all combinations, despite proving it doesn't yourself and repeatedly saying the string ..1111 isn't on it! Nor is ..01010101, nor is ..001100110011 etc.
You make two accurate assertions - that there is no bijection between N and P(N) and that the Finite Power set is countable. The problem is you then say they are the same thing! They are not. You prove this yourself.
And I don't understand why you seem think that N is not an element of P(N) {N is the set of natural numbers}, that is the only way I can read your statement about when ...1111 is a combination.