Empty Set with Left Arrow Above ⦴

⦴ (U+29B4) is a standard Unicode character that you can copy and paste anywhere text is accepted. This page provides a concise reference with safe tips, internal links, and practical guidance so you can use it reliably across apps and platforms.

What it is and where it’s used: Empty Set with Left Arrow Above is part of the Symbols family (block: Miscellaneous Mathematical Symbols-B). If you need styled or decorative alternatives, try our Fancy Text tool to generate compatible text that works in most modern interfaces.

History & usage: The symbol U+29B4, named EMPTY SET WITH LEFT ARROW ABOVE, is part of the Miscellaneous Mathematical Symbols-B block. It is a specialized mark used in mathematical notation to show an empty set with a leftward arrow above it. In practice, this shape appears in logic diagrams and advanced math texts where a null result or directed emptiness is described. It is not common in everyday writing, but it is supported by Unicode and can be rendered in fonts that include supplemental math symbols. In many interfaces and documents, arrows often indicate direction and navigation cues, guiding users through steps or choices. This symbol carries a similar idea in formal work, signaling a directional constraint or a placeholder that represents an empty outcome with a specified direction. In type settings, authors select it when exact semantics require both an empty set and a directional cue. Its use tends to be specialized and bounded to fields like set theory, graph theory, and formal logic. For readers, the key point is that this mark combines two concepts into one glyph, serving precise, technical meanings rather than everyday navigation.

Copy and input: the quickest method is to copy the character here. You can also insert it by its codepoint U+29B4 in many development tools or editors. Some operating systems provide a character viewer or input palette that lets you search by name or code and insert the glyph into documents.

Display and fallback: if you see an empty box (tofu) or a placeholder rectangle, the active font might not include this codepoint. Switching to a font with broader Unicode coverage or using a fallback font usually fixes the issue. On the web, ensure the page’s font stack includes a general‑purpose fallback.

Related references: browse the Categories for similar characters. When choosing a symbol, prefer the official codepoint for semantic clarity and better compatibility with search, copy, and accessibility tooling.

See our category page for related symbols.