Counting to Infinity
and Beyond
- When you count a set
of objects you are in effect labelling them:
- Let's use this
second way of labelling when we try to count an
infinite number of objects:
- The number of
objects is given by the next label to be used. This
label cannot be any of our 'nomal' finite numbers. The
label used is the greek letter omega:
.
So we have counted objects so far. Now we have a
surprise in store:
- But try counting the
objects the other way round:
- Since the last label
used is
then you have counted to +1
which is the next label to be used. So counting beyond
our normal finite numbers into the transfinite numbers
springs an amazing surprise:
- You might like to
figure out the meaning of 2 x
and x 2
. Are they the same?
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