### How Many

How many non-standards models of Peano Arithmetics exist? (Hint: The Gödel construction gives you ${\\aleph_0}$ many models. One can also prove the existence of $\\mathbf{c} = \\aleph_1$ many such models using the fact that there are  ${\\aleph_0}$ many primes.)

Yes, 'n' how many particles of Cantor dust can lie on a Sierpinski carpet?

Posted by Richard Veryard on January 19, 2008 at 02:55 AM PST #

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