Right Arrow with Small Circle

Right Arrow with Small Circle at U+21F4 denotes a rightward arrow modified by a small open circle, typically read as a specialized arrow relation rather than ordinary punctuation. It is part of the Arrows block, a collection of mathematical and technical arrow symbols used for mappings, transformations, implications, and diagram notation. In real use, this character is most often encountered in mathematical typesetting and formal notation when an author needs a distinct rightward relation that is not the plain right arrow. The small circle can suggest an added condition, marked source, or operator-like variant, but its exact meaning is convention-defined; a paper, textbook, or diagram legend should define it before relying on it. It may also appear in logic, category-theory-style diagrams, or technical flow descriptions where several arrow shapes must be visually distinguished. Because it is uncommon compared with →, ⇒, or ↦, readers should not assume a universal interpretation from the glyph alone. Font coverage is less consistent than for basic arrows, so it is sometimes substituted with a simpler arrow in environments with limited symbol fonts.