Is multiplication of infinite cardinals defined in ZF without Choice?
A question about cardinal arithmetics without the Axiom of Choice
4
$\begingroup$
set-theory
cardinals
axiom-of-choice
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2This may sound silly, but what exactly do you mean by multiplication? Multiplication of (real/natural) numbers? Multiplication of cardinals? – 2012-01-25
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0I'm sorry. I meant multiplication of infinite cardinals. – 2012-01-25