## The Mathematical Symbol "Element of with Long Horizontal Stroke (⋲)"

The "Element of with Long Horizontal Stroke" Symbol (⋲)

The ⋲ symbol is a less commonly used mathematical notation that may denote the concept of "not an element of" in set theory. However, the standard representation for "not an element of" is typically written as ∈ with a line through it. The specific usage and meaning of ⋲ can vary based on the context in which it's used, and it's essential to refer to the specific definition given in a mathematical text or paper.

## Visual Representation

This symbol visually consists of the "element of" symbol (∈) with a long horizontal line (or stroke) going through it.

## Common Uses

Given the variability in its use, it's most commonly found in:

• Set Theory: To indicate that a certain element does not belong to a particular set.
• Examples:
• If $$a$$ is not an element of set $$B$$, then it could be expressed as $$a ⋲ B$$.

## Representation in Other Contexts

In LaTeX, depending on the package or symbol set you're using, there might not be a direct command for ⋲. However, you can typically represent "not an element of" using \notin within a mathematical environment.

## Conclusion

The ⋲ symbol serves as a notation to represent the exclusion of an element from a set. Whenever encountering this or similar symbols, it's always crucial to be aware of the specific context and the definitions provided in the relevant mathematical literature or documentation.

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## Codes for the ⋲ Symbol

 The Symbol ⋲ Alt Code Alt 8946 HTML Code ⋲ HTML Entity ⋲ CSS Code \22F2 Hex Code ⋲ Unicode U+22F2

## How To Insert the ⋲ Symbol

(Method 1) Copy and paste the symbol.

The easiest way to get the ⋲ symbol is to copy and paste it into your document.

Bear in mind that this is a UTF-8 encoded character. It must be encoded as UTF-8 at all stages (copying, replacing, editing, pasting), otherwise it will render as random characters or the dreaded �.

(Method 2) Use the "Alt Code."

If you have a keyboard with a numeric pad, you can use this method. Simply hold down the Alt key and type 8946. When you lift the Alt key, the symbol appears. ("Num Lock" must be on.)

(Method 3) Use the HTML Decimal Code (for webpages).

HTML TextOutput
<b>My symbol: &#8946;</b>My symbol: ⋲

(Method 4) Use the HTML Entity Code (for webpages).

HTML TextOutput
<b>My symbol: &disin;</b>My symbol: ⋲

(Method 5) Use the CSS Code (for webpages).

CSS and HTML TextOutput
<style>
span:after {
content: "\22F2";}
</style>
<span>My symbol:</span>
My symbol: ⋲

(Method 6) Use the HTML Hex Code (for webpages and HTML canvas).

HTML TextOutput
<b>My symbol: &#x22F2;</b>My symbol: ⋲
On the assumption that you already have your canvas and the context set up, use the Hex code in the format 0x22F2 to place the ⋲ symbol on your canvas. For example:
JavaScript Text
const x = "0x"+"E9"
ctx.fillText(String.fromCodePoint(x), 5, 5);
Output

(Method 7) Use the Unicode (for various, e.g. Microsoft Office, JavaScript, Perl).

The Unicode for ⋲ is U+22F2. The important part is the hexadecimal number after the U+, which is used in various formats. For example, in Microsoft Office applications (e.g. Word, PowerPoint), do the following:
TypeOutput
22F2
[Hold down Alt]
[Press x]

(The 22F2 turns into ⋲. Note that you can omit any leading zeros.)
In JavaScript, the syntax is \uXXXX. So, our example would be \u22F2. (Note that the format is 4 hexadecimal characters.)
JavaScript TextOutput
let str = "\u22F2"
document.write("My symbol: " + str)
My symbol: ⋲