You simply can't grasp that sums (in the case of positive added values) are the results of a finite addition.
Er, Doron, we all know the sum of the series is NOT a sum of an infinite number of elements, but the LIMIT of an infinite SEQUENCE of partial -- finite -- sums.
It's just that it's often convenient to speak of the "infinite sum" 1+1/2+1/4+... instead of being precise and saying what this colloquial term really means, namely, that it's the limit of the sequence {1, (1+1/2), (1+1/2+1/4),...}.
Open any Freshman's math textbook and you'll find the "sum" (or "infinite sum") of an infinite series defined in the way I just gave. There is no infinite summation.
You are, as usual, confusing symbols or words -- in this case, a definition ("infinite sum") that defines no new mathematical elements but is merely used as a verbal shortcut -- with reality, that is, you think that people using the words "infinite sum" or "the sum of an infinite series" means that they are actually summing (using the addition operation) an infinite number of times "at once". They're not.
In principle there is nothing you can say about infinite series that you cannot equally well say about infinite sequences. In fact the transition from one to another is trivial. It's just that it's more convenient to sometimes work with one and not with another.
1 – (1/2+1/4+1/8+1/16+…) > 0 by fog 0.000...1/2
2 - (1/1+1/2+1/4+1/8+...) > 0 by fog 0.000...1/2
Uh-huh...
Quite apart that it isn't clear what on earth Doron means when he put the "1/2" at the "end" of an infinite sequence of zeroes -- which is the equivalent of putting a point at the "end" of a line -- it's amusing to see what the results of using his own definitions would be.
For example, let's take the first line:
1 - (1/2 + 1/4 + 1/8 + 1/16 + ...) = fog 0.00000......1/2
Multiply both sides by 2:
2*1 - 2*(1/2 + 1/4 + 1/8 + 1/16 + ...) = 2* fog 0.0000 .... 1/2
Or:
2 - (1 + 1/2 + 1/4 + 1/8 ....) = 2* fog 0.000000.... 1/2
But, according to Doron's own definition (2nd line):
2 - (1 + 1/2 + 1/4 + 1/8 ...) = fog 0.0000.... 1/2
Therefore:
2* fog 0.000.... 1/2 = fog 0.0000..... 1/2
But if 2X=X, then obviously X=0, that is:
fog 0.000000... 1/2 = 0
Which would make Doron's definitions mean:
1 – (1/2+1/4+1/8+1/16+…) > 0 by 0
2 - (1/1+1/2+1/4+1/8+...) > 0 by 0
Or:
1 – (1/2+1/4+1/8+1/16+…) = 0
2 - (1/1+1/2+1/4+1/8+...) = 0
...which is what we're trying to
tell you
all along, Doron!
In other words, if Doron wants to define "fog 0.0000.....1/2" or "fog 0.0000....1" or "fog 0.0000.....10^100", his way, he is quite free to do so, but -- to be consistent with his very own definitions -- all these "fogs" must be all = 0, and are, in other words, just a fancy way of writing the number "0".
Doron has many more definitions of "0" than the rest of us -- infinitely more, in fact. I suppose that's another way of saying he has infinitely more holes in his head than the average mathematician does?