U+2964 "⥤" Rightwards Harpoon with Barb Up Above Rightwards Harpoon with Barb Down Unicode Character

U+2964 "⥤" Rightwards Harpoon with Barb Up Above Rightwards Harpoon with Barb Down is a mathematical symbol that combines two horizontally oriented harpoons stacked vertically, with the top harpoon featuring a barb pointing upward and the bottom harpoon featuring a barb pointing downward, both aimed to the right. This compound character is primarily used in mathematical notation and formal logic to denote a bidirectional or dual relationship, often representing a specific type of map, transformation, or equivalence between two entities where the interaction involves both an upward and a downward component. It belongs to the Supplemental Arrows-B block and is typically rendered in text to indicate a nuanced directional relationship distinct from simpler arrows.