Neither a Subset of nor Equal To ⊈

⊈ (U+2288) 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: Neither a Subset of nor Equal To is part of the Symbols family (block: Mathematical Operators). 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 NEITHER A SUBSET OF NOR EQUAL TO is used in set theory to relate two sets or classes. It is written as ⊈ and reads as “A is not a subset of B.” The name explains its meaning. It signals that every element of the first set is not guaranteed to be in the second set, and it also indicates that the two sets are not equal. This distinction helps avoid false assumptions about containment. In practice, you will see it in formulas and in user interfaces that show relationships between items. It helps clarify when one group does not fully lie inside another group. The symbol is part of the standard set of mathematical operators. It is useful in proofs and in data descriptions where precise relations are needed. As a common math symbol, it supports clear communication about structure and inclusion. Use it when you need to state a noncontainment relation and when equality cannot be assumed. Its role is straightforward and practical for math notation and basic interfaces.

Copy and input: the quickest method is to copy the character here. You can also insert it by its codepoint U+2288 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.