Re: Switching to Linux, now what to buy?

From: Peter T. Breuer (ptb_at_oboe.it.uc3m.es)
Date: 09/25/05 

Date: Sun, 25 Sep 2005 13:40:42 +0200

Enrique Perez-Terron <enrio@online.no> wrote:
> Actually the original idea when I started "analyzing" the problem
> in the post was that I felt I was blocking myself from seeing the
> obvious, and I have sometimes managed to force myself over that
> barrier by looking hard at the search space definition. I started

Yes, that is good. In your first post you got close when you considered
generating one set of things from another (AFAIR) and thought about primes
or sets of number coprime to an existing set. I had trouble avoiding
pointing you either towards or away from that line of thought.

Michael also was close in that for some amazing reason he chose to
consider euler's phi (which I did not remember at all) but did not
notice that the peaks in the phi function WERE the sequence given.

> writing with the conviction I was not going to post it, but since
> I did not find out much I thought perhpas it could spark off
> something in one of the others. It did, but in myself.

Well done.

I think that trying to think of an irregular monotonic rising series
was a good way to go. I had already said that no algebraic expression
would give the sequence (but that a computation was possible). Looking
at the number of members of the sequence in each integer range might
have shown a log/n behaviour too.

Peter