I can't find anything on this anywhere. The book I'm largely using at the moment is based around ZFC, so it makes no mention of anything other than the Aleph numbers, but according to Wikipedia on the Cardinal Numbers page, if you're not using the axiom of choice then there are non-Aleph ones.
I don't like putting too much stock in Wikipedia, but it usually tends to be decent enough for Maths so it seems worth asking. I do have a book on Naive Set Theory, but it doesn't seem to mention anything outside of the Aleph numbers either. Originally I thought it was just talking about the Continuum hypothesis, but that doesn't seem to be the case, and google just brings up the Aleph numbers whatever I try search for anything because everything is based around the ZFC axioms, so any chance anyone could shed any light on this with an example, or has a link or something?
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