symbol for infinity:
(if you have a mac, type option-5)
http://mathforum.org/dr.math/faq/faq.large.numbers.html
http://www.c3.lanl.gov/mega-math/wor...ty/inbkgd.html
http://www.c3.lanl.gov/mega-math/glo.../infinity.html
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Infinity is not a number or a thing, but the idea behind many notions:
- no matter how high you count, you can always count higher.
- no matter how long you draw a pair of parallel lines, they never meet.
- if you start with a line of any length, you can divide it in half, then divide one of the pieces in half, and no matter how many times you repeat the process, you will always have another piece that you can divide in half again.