Aleph null (ℵ0): the smallest infinite cardinal Aleph null Aleph null (ℵ0) denotes the cardinality of the natural numbers: the first infinite cardinal. This article explains its meaning, examples, basic properties, history and key distinct…
Cardinality of sets: measuring the size of finite and infinite collections Cardinality Explore cardinality: how mathematicians define and compare the size of finite and infinite sets using bijections and injections, and classify sets as finite, countable, or uncounta…
