0x2229

0x2229 is the hexadecimal notation for the Unicode code point U+2229, which designates the mathematical symbol for intersection, commonly written as ∩. In Unicode, this symbol is named N-ARY INTERSECTION and is part of the Mathematical Operators block. It is used to denote the elements common to multiple sets or conditions, and appears frequently in set theory, logic, and related areas of mathematics and computer science.

In practical terms, 0x2229 can be encoded in several ways. In UTF-8, the code point U+2229 is encoded as three bytes: E2 88 A9. In HTML it can be represented by the symbol’s named entity ∩ or by numeric references ∩ (decimal) or ∩ (hex). In many programming languages, the character can be included in strings with Unicode escapes such as \u2229 or, depending on the language, \u{2229}.

Usage examples include A ∩ B to denote the intersection of sets A and B, consisting of elements that belong to both. For a family of sets {A_i}, the intersection over i is written ∩_i A_i. The symbol also appears in logic and other formal systems as a conjunction-like operator, echoing the idea of “and” across multiple conditions or criteria.

Related symbols include U+222A (union, ∪) and other operators in the Unicode Mathematical Operators block.