eli5 What does ‘Aleph Null’ mean in mathematics?

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I’m trying to get to grips with what this term means. I’m interested in mysticism, philosophy etc and it seems like a fascinating idea especially considering the symbolism of the Aleph.

I have absolutely no maths knowledge… Just a GCSE in maths and some mental arithmetic.

Edit; thanks everyone for your useful responses!!

In: Mathematics

10 Answers

Anonymous 0 Comments

It’s the cardinality of the natural numbers, so if a set has cardinality “aleph naught”, then it is “countably infinite”. Some infinite sets are “bigger” than this, and that’s when a cardinality like “aleph one” might come into play.

This stuff can be confusing, so don’t give yourself a hard time if you don’t understand it!

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