Dot Plus

The Mathematical Symbol "Dot Plus (∔)"

The "Dot Plus" Symbol (∔): Beyond Ordinary Addition

Amidst the comprehensive assortment of mathematical symbols, the ∔, commonly referred to as the "Dot Plus," has a special position. At first glance, it might seem like a simple variant of the standard addition symbol. However, in specific contexts, it carries a unique significance that sets it apart from ordinary addition. This lesson covers this symbol in detail.

Deciphering the ∔ Symbol

The ∔ symbol can be visually described as the standard plus sign with a dot in its center. While it closely resembles the addition symbol, its usage can diverge based on the mathematical framework it's applied in.

Example 1: Alternative Binary Operations

In abstract algebra, the ∔ might denote a binary operation that differs from regular addition. For instance, in a particular algebraic structure, this symbol could represent a unique operation with properties distinct from standard addition.

Example 2: Special Additive Operations

In advanced calculus or other mathematical contexts, ∔ might symbolize an addition that accounts for certain conditions, constraints, or nuances that the regular addition symbol doesn't capture.

Applications and Insights

The ∔ symbol finds its relevance in a few specialized areas of mathematics:

• Abstract Algebra: to show specific binary operations that are related but not identical to standard addition.
• Advanced Calculus and Analysis: To represent constrained or nuanced additive operations that need a distinct symbol for differentiation.

While it's not an everyday symbol for most, the ∔ stands as a testament to the intricate and detailed nature of mathematical notation. Every symbol, no matter how similar it looks to another, has the potential to carry a unique meaning.

To wrap up, the ∔ is a reminder of the depth and breadth of mathematical symbols. Its existence underlines the need for precise notation in situations where the standard symbols might not convey the full story.

Are You Good at Mathematical Symbols?

Do you know, or can you guess, the technical symbols? Well, let's see! Show Instructions

Codes for the ∔ Symbol

The Symbol	∔	copy
Alt Code	Alt 8724	copy
HTML Code	∔	copy
HTML Entity	∔	copy
CSS Code	\2214	copy
Hex Code	∔	copy
Unicode	U+2214	copy

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 8724. 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: &#8724;</b>	My symbol: ∔

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

HTML Text	Output
<b>My symbol: &plusdo;</b>	My symbol: ∔

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

CSS and HTML Text	Output
<style> span:after { content: "\2214";} </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: &#x2214;</b>	My symbol: ∔

On the assumption that you already have your canvas and the context set up, use the Hex code in the format 0x2214 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+2214. 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
2214 [Hold down Alt] [Press x]	∔ (The 2214 turns into ∔. Note that you can omit any leading zeros.)

In JavaScript, the syntax is \uXXXX. So, our example would be \u2214. (Note that the format is 4 hexadecimal characters.)

JavaScript Text	Output
let str = "\u2214" document.write("My symbol: " + str)	My symbol: ∔

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