U+2A1C "⨜" Integral with Underbar Unicode Character

U+2A1C "⨜" Integral with Underbar is a typographic variant of the integral sign, distinguished by a horizontal bar placed beneath the standard integral symbol. This character is used primarily in mathematical notation to represent a specific type of integral, often indicating an area integral or a closed integral with an added notational emphasis through the underbar. It belongs to the Supplemental Mathematical Operators block, serving to extend the range of symbols available for complex formulas in fields like calculus and analysis.