U+2AA3 "⪣" Double Nested Less-than with Underbar Unicode Character

U+2AA3 "⪣" Double Nested Less-than with Underbar is a mathematical relational symbol consisting of two stacked less-than signs, resembling a double less-than but with an additional underline beneath the glyph. It is encoded in the Supplemental Mathematical Operators block and is typically used in advanced mathematical notation, particularly in logic or order theory, to denote a specialized ordering or comparison relation, such as a strict variant of a nested inequality or a custom binary operator in formal systems. Its inclusion in Unicode allows for precise textual representation in digital documents without relying on font-specific approximations.