Re: [Haskell-cafe] Very freaky

On Jul 12, 2007, at 17:11 , Andrew Coppin wrote:

Felipe Almeida Lessa wrote:

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On 7/12/07, Andrew Coppin wrote:

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How come the set of all sets doesn't exist?

http://www.google.com/search?q=set+of+all+sets leads to http://en.wikipedia.org/wiki/Set_of_all_sets which has the answer, I think.

Ouch.

Clearly, set theory is way more complicated than people make out. (I always thought a "set" was just a collection of objects...)

You might want to look over some of the introductory set theory stuff on the Good Math, Bad Math blog: http://scienceblogs.com/goodmath/ -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH