On 11/03/18 12:00, Mario Xerxes Castelán Castro wrote: > For example, skolemization can not be done in-logic in the > general case and Schröder-Bernstein theorem does not hold, so > cardinalities can not be proved to form a total order.
My bad. I was confused with the Schröder-Bernstein. I withdraw the claim that it requires AC. Still, without AC, cardinalities are not provably totally ordered.
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