The next larger cardinality is $\aleph_1$.
Then $\aleph_2$ and so on.
The aleph numbers are best known for their relevance to the Continuum Hypothesis.
See Continuum Hypothesis for more details.
He defined the notion of cardinality.
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): Entry: aleph