The Mathematical Symbol "Delta Equal To (≜)"

The "Delta Equal To" Symbol (≜): A Deep Dive

Mathematics and its associated fields abound with symbols that encapsulate intricate concepts. The "Delta Equal To" symbol, denoted as ≜ serves as one such notable example. This symbol captures a nuanced relationship between entities, and in this article, we'll explore its essence and provide illustrative examples.

Understanding ≜

The ≜ symbol typically merges the ideas of change (often represented by "Delta" or Δ) with equivalence or equality. When viewed within its mathematical context, it can indicate that a particular change or difference between entities is precisely defined or has a specific value.

Example 1:

In calculus, if a function's rate of change at a specific point is defined or known, this might be expressed using the ≜ symbol. For instance, if the rate of change of function \( f(x) \) at \( x = a \) is known to be \( c \), this relationship might be captured as:

\( f'(a) ≜ c \)

Example 2:

In a financial context, if the relative difference between two economic metrics is known to be equivalent to a third metric, this relationship can be symbolically represented using ≜. For example, if the change in revenue (ΔR) relative to the previous year is precisely equal to a particular forecast metric \( F \), this can be depicted as:

ΔR ≜ F

These examples showcase the ≜ symbol's capacity to represent specific differences or changes in various mathematical and applied contexts. As with many mathematical symbols, comprehending its exact implication depends on the overarching context in which it's presented.

Mathematical symbol 'Delta Equal To'

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Codes for the ≜ Symbol

The Symbol
Alt CodeAlt 8796
HTML Code≜
HTML Entity≜
CSS Code\225C
Hex Code≜

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 8796. 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: &#8796;</b>My symbol: ≜

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

HTML TextOutput
<b>My symbol: &trie;</b>My symbol: ≜

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

CSS and HTML TextOutput
span:after {
content: "\225C";}
<span>My symbol:</span>
My symbol: ≜

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

HTML TextOutput
<b>My symbol: &#x225C;</b>My symbol: ≜
On the assumption that you already have your canvas and the context set up, use the Hex code in the format 0x225C to place the ≜ symbol on your canvas. For example:
JavaScript Text
const x = "0x"+"E9"
ctx.fillText(String.fromCodePoint(x), 5, 5);

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

The Unicode for ≜ is U+225C. 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:
[Hold down Alt]
[Press x]

(The 225C turns into ≜. Note that you can omit any leading zeros.)
In JavaScript, the syntax is \uXXXX. So, our example would be \u225C. (Note that the format is 4 hexadecimal characters.)
JavaScript TextOutput
let str = "\u225C"
document.write("My symbol: " + str)
My symbol: ≜