Re: infinity
- From: snapdragon31@xxxxxxxxx
- Date: 4 Aug 2005 01:36:00 -0700
Hi Theo. Before answering your question, I would like to do some math
on infinite series first and then explain to you why the vase is not
empty at the noon time.
Let S = 1 + 2 + 3 + 4 + 5 + 6 + ... + oo oo = infinity
Then 2*S = 2 + 4 + 6 + 8 + .... + oo
Subtract S from 2*S, we have
2*S - S = (2 + 4 + 6 + ... + oo) - (1 + 2 + 3 + 4 + 5 + 6 + ... +
oo)
==> S = (2 + 4 + 6 + ... + oo) - (1 + 3 + 5 + ... + oo + 2 + 4 + 6 +
.... + oo)
==> S = (2 + 4 + 6 + ... + oo) - (1 + 3 + 5 + ... + oo) - (2 + 4 + 6 +
.... + oo)
==> S = -(1 + 3 + 5 + 7 .... + oo)
What? The summation of all integers is a negative number? Obviously
there must be something wrong. The error is that we cannot rearrange
numbers like that for an infinite series.
Now go back to your question
Let S1 be the balls being put in the vase
Let S2 be the balls being taken out from the vase
At time = noon
S1 = {1, 2, 3, ... , oo} n(S1) = oo
S2 = {1, 2, 3, ... , oo} n(S2) = oo
# of balls in the vase would be n(S1) - n(S2) = oo - oo which is
undefined.
As seen from the previous example, we cannot just cancel out same terms
from each set and come up with result zero. S1 and S2 are infinite
series with different properties. We cannot simply say every number in
the set S1 also exists in S2 then S1 - S2 = 0. If you do that then you
are rearrangeing the numbers in the infinite series.
In mathematics, usually if at 'noon' the question is undefined then we
would take the limit of the time --> noon to see the tendency of the
result
As time --> noon
S1 = {1, 2, 3, ... , 10n) Number of S1 = 10n
S2 = {1, 2, 3, ... , n) Number of S2 = n
The remaining balls are {n+1, n+2, ... , 10n}
# of balls remained in the vase would be n(S1) - n(S2) = 10n - n = 9n >
0
Therefore, the vase is not empty and actually it is growing rapidly.
>>From a physical point of view, the number of balls in the vase are
growing rapidly as the time approaches noon. Even though, right at
the noon time, the problem is undefined but we would expect the vase is
not empty.
.
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