U+27FD "⟽" Long Leftwards Double Arrow from Bar Unicode Character

U+27FD "⟽" Long Leftwards Double Arrow from Bar is a mathematical symbol typically used in logic, computer science, and formal notation to represent a specific type of relation or mapping, often indicating a bidirectional implication with a functional constraint originating from a bar or boundary. Visually, it features a double-headed arrow pointing to the left with a vertical bar attached to its tail on the right side, distinguishing it from other arrow symbols. This character is part of the Supplemental Arrows-A block in Unicode, where it serves as a specialized operator for expressing concepts like a leftward double arrow with a defined starting point or restriction.