The Mathematical Symbol "Questioned Equal To (≟)"
The ≟ Symbol: Questioned Equal To
The ≟ symbol is not as prevalent as other mathematical symbols, and it typically represents an equality that is questionable or to be determined. This might be seen in contexts where an assertion or assumption is made, but confirmation or proof is pending or uncertain.
Usage
The primary purpose of ≟ is to denote a tentative or speculative equivalence. It's particularly useful in settings where one wants to highlight that two quantities or expressions might be equal, but this is either not yet confirmed or is reliant on certain conditions or assumptions.
Examples
- Example 1: In a mathematical proof or exploration, one might posit that \( a \) is ≟ \( b \) based on preliminary calculations or observations. This would indicate that while \( a \) and \( b \) seem to be equal based on the available information, this hasn't been rigorously established.
- Example 2: In computational or experimental settings, when two algorithms or methods produce results that seem identical, but haven't been thoroughly compared or validated, one might use ≟ to represent this provisional equality.
Since the ≟ symbol is not as commonly used as other mathematical notations, it's crucial to provide context or a specific definition when using it. This ensures clarity and avoids any potential confusion for the reader or audience.
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Codes for the ≟ Symbol
| The Symbol | ≟ | |
| Alt Code | Alt 8799 | |
| HTML Code | ≟ | |
| HTML Entity | ≟ | |
| CSS Code | \225F | |
| Hex Code | ≟ | |
| Unicode | U+225F |
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 8799. 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: "\225F";} </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+225F. 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 |
|---|---|
| 225F [Hold down Alt] [Press x] | ≟ (The 225F turns into ≟. Note that you can omit any leading zeros.) |
| JavaScript Text | Output |
|---|---|
| let str = "\u225F" document.write("My symbol: " + str) | My symbol: ≟ |