\alefThe command \alef in LaTeX is used to represent the Hebrew letter Aleph, which is often used in mathematics to denote the cardinality of infinite sets, such as the set of natural numbers. It is a symbol that appears in set theory and other mathematical contexts.
Represents the smallest infinity, the cardinality of the set of natural numbers.
\aleph_0Represents the next level of infinity, often associated with the cardinality of the set of countable ordinal numbers.
\aleph_1General representation of Aleph numbers, where \alpha is an ordinal number.
\aleph_{\alpha}