The Mathematical Symbol "Subset of with Not Equal To (⊊)"
The "Subset of with Not Equal To" Symbol (⊊)
The ⊊ symbol represents the mathematical concept that one set is a subset of another, but not equal to it. This means that all the elements of the first set are contained within the second set, but the two sets are not identical.
Visual Representation
The ⊊ symbol visually appears as the "subset of" symbol (⊂) combined with a strikethrough or slash (similar to ≠ for "not equal to"). The slash indicates the "not equal to" part of the definition, suggesting that while the first set is contained within the second, they are not the same set.
Usage
In set theory, if we have two sets, A and B, and A is a subset of B but not equal to B, we can represent this relationship as \(A \, ⊊ \, B\).
This implies that every element of A is also an element of B, but there exists at least one element in B which is not in A.
Typing ⊊
To represent the "Subset of with Not Equal To" symbol in documents or platforms that support HTML entities, you can use the ⊊ entity. However, the appearance of the symbol may vary slightly based on the font and platform being used. In environments outside of HTML, specialized mathematical software or libraries might provide ways to depict the symbol accurately.
Related Symbols
Here are some related symbols in the context of set theory and related mathematical disciplines:
- ⊂ (Subset of)
- ⊆ (Subset of or Equal To)
- ⊋ (Superset of with Not Equal To)
- ∉ (Not an Element of)
Conclusion
Mathematical symbols such as &
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Codes for the ⊊ Symbol
| The Symbol | ⊊ | |
| Alt Code | Alt 8842 | |
| HTML Code | ⊊ | |
| HTML Entity | ⊊ | |
| CSS Code | \228A | |
| Hex Code | ⊊ | |
| Unicode | U+228A |
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 8842. When you lift the Alt key, the symbol appears. ("Num Lock" must be on.)(Method 3) Use the HTML Decimal Code (for webpages).
| HTML Text | Output |
|---|---|
| <b>My symbol: ⊊</b> | My symbol: ⊊ |
(Method 4) Use the HTML Entity Code (for webpages).
| HTML Text | Output |
|---|---|
| <b>My symbol: ⊊</b> | My symbol: ⊊ |
(Method 5) Use the CSS Code (for webpages).
| CSS and HTML Text | Output |
|---|---|
|
<style> span:after { content: "\228A";} </style> <span>My symbol:</span> | My symbol: ⊊ |
(Method 6) Use the HTML Hex Code (for webpages and HTML canvas).
| HTML Text | Output |
|---|---|
| <b>My symbol: ⊊</b> | My symbol: ⊊ |
| 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+228A. 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:| Type | Output |
|---|---|
| 228A [Hold down Alt] [Press x] | ⊊ (The 228A turns into ⊊. Note that you can omit any leading zeros.) |
| JavaScript Text | Output |
|---|---|
| let str = "\u228A" document.write("My symbol: " + str) | My symbol: ⊊ |