U+23AE "⎮" Integral Extension Unicode Character

U+23AE "⎮" Integral Extension is a typographical symbol used primarily in mathematical typesetting to represent the vertical extender bar that forms the middle section of a long integral sign. Unlike the standard integral symbol, which is typically a single glyph, this character is designed to be stacked or repeated vertically, allowing for the construction of tall integral signs that span multiple lines of text or mathematical expressions. It functions as a kind of invisible or semivisible connector, ensuring visual continuity when a system lacks automatic glyph scaling, and is most commonly seen in plain text or older document formats where complex mathematics is represented with discrete character components.