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Exactly how many axes of symmetry does a circle have?
Question
#39628. Asked by super babe. (Oct 08 03 5:36 AM)
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sequoianoir
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An infinite number !
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mibmob
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Although DB is right, how can infinity be an exact number/amount?
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Kainantu
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Infinity plus 1 minus 1 mibmob.
That's a number
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gmackematix
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Which infinity? Aleph null? Aleph one?
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Gnomon
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The number of axes is C, the infinity of the Continuum, rather than Aleph Null, the countable infinity, since you asked.
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gmackematix
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I've never heard aleph one called C before but, yes, it is the next one up from aleph null.
For the confused out there, a mathematician called George Cantor found that not all infinities were the same and labelled the different infinities with the Hebrew first letter aleph followed by a number, starting with aleph zero (also called aleph null). Aleph-null indicates the infinite number of any set that can be put in one-to-one correspondence with 1,2,3,4,5,... Strangely, this includes all fractions with a whole top and bottom.
The next highest infinity, sleph-one is the infinite number of all sets that can be paired off with all the points on a line. This includes all the points in space which can be projected onto a line.
There are "bigger" infinities such as aleph-two, the number of, say, the set of all possible curved graphs of y as a function of x.
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