My infinity’s bigger than yours

17 Aug 2007 · Posted in Mathematics 

An article from Scientific American explains how Infinity Comes in Different Sizes.

According to the article, the 19th century German mathematician Georg Cantor showed …

… there are more real numbers packed in between zero and one than there are numbers in the entire range of naturals.

I remember being blown away by the concepts of “countably infinite” (for example, the whole numbers 0, 1, 2, 3, … is a countably infinite set) and “uncountably infinite” (for example, the number of all numbers – that’s all the rationals, irrationals, complex numbers, etc.)

Cantor created Set Theory, a topic that was used and abused in secondary schools for many years. According to this Wikipedia article, after developing the concept of transfinite numbers, Cantor took himself a little too seriously and died a seriously depressed man.

I can’t resist concluding with Einstein’s profound quote:

Two things are infinite: the universe and human stupidity; and I’m not sure about the universe.

Comments

2 Responses to “My infinity’s bigger than yours”

  1. Li-sa on August 19th, 2007 7:17 am

    But, sure about human stupidity! ^.^

  2. Shah muhammad on November 12th, 2008 6:44 pm

    Human thought is an infinite set of infinities, because it can encompass the whole universe and every thing inside it. Once you have imbibed this concept, you also become infinite.

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