U+21BF "↿" Upwards Harpoon with Barb Leftwards Unicode Character

U+21BF "↿" Upwards Harpoon with Barb Leftwards is a typographical symbol classified under the Arrows block, used in mathematical notation and technical diagrams to indicate an upward directional vector with a leftward-facing barb on its shaft. This symbol is part of a family of harpoon arrows that denote relational or mapping concepts, often appearing in proofs or algorithms to specify a one-way upward movement while the barb clarifies the orientation along a horizontal axis. It is distinct from similar characters by its leftward hook, which can represent selective copying or a directed operation in formal logic or computer science contexts.