U+21EE "⇮" Upwards White Double Arrow Unicode Character

U+21EE "⇮" Upwards White Double Arrow is a typographic symbol belonging to the Arrows block, designed to represent a doubled upward pointing arrow with a white, unfilled outline. This glyph is commonly used in mathematics, computer science, and formal logic to denote a strong or doubled implication, mapping, or transformation in the upward direction, often signifying a bidirectional or reinforced relationship. Its visual appearance, with two parallel arrowheads pointing upward, distinguishes it from single arrows and can be employed in diagrams, user interfaces, or technical documentation to indicate upward navigation, scrolling, or an amplified directional cue. The character’s open body is intended to provide clarity when displayed against various backgrounds, making it a functional element in specialized notation systems.