Aleph (concept)

Aleph is a concept from mathematics and set theory representing a measure of the size or cardinality of infinite sets. It is used to compare different infinite quantities, with Aleph-null (ℵ₀) being the smallest infinity, such as the set of natural numbers. Larger infinities, like the set of real numbers, are represented by higher Aleph numbers. Essentially, Aleph provides a way to understand and differentiate between various "sizes" of infinity, helping mathematicians study the structure and hierarchy of infinite sets in a rigorous way.