Intersection Symbol ∩

The mathematical form covered here is ∩; its encoded identity is U+2229, INTERSECTION. ∩ is U+2229 INTERSECTION. In set theory, A ∩ B is the set of elements that belong to both A and B. Representative expressions include A ∩ B, {1,2} ∩ {2,3} = {2}, Events: P(A ∩ B), and S ∩ T = ∅. Read every Intersection Symbol example as a complete mathematical statement and not as decorative use of ∩. The scope is deliberately narrow: ∩ is U+2229 INTERSECTION. The Intersection Symbol page separates ∩ from lookalikes and from broader concepts that do not share the same encoded identity. Three checks catch most errors: confusing ∩ with union ∪, reading ∩ as logical AND without context, and reversing the result of union and intersection. For Intersection Symbol, confirm that the pasted text still contains ∩ and has not been replaced by a visually similar form. For consistent output, apply the following practices: place a set expression on each side of ∩, use ∅ when the intersection is empty, distinguish set intersection from logical conjunction, and use large-operator notation for indexed intersections when appropriate. For Intersection Symbol, literal UTF-8 is the clearest option when the destination supports the full U+2229 sequence. A useful scope question is “What is A ∩ B?” The reviewed answer is: It is the set containing elements common to both A and B. The device instructions provide a second identity check. Windows: In Microsoft Word, type 2229 and press Alt+X. For the intersection symbol entry, in other Windows apps, use Character Map or copy ∩ from this page. macOS: Open Character Viewer with Control+Command+Space and search for “intersection,” or copy ∩. A reliable final check is to compare the saved text with U+2229, review the surrounding label, and test the target font or application before the page is published.