https://en.wikipedia.org/wiki/Multiplication_sign
The multiplication sign (×), also known as the times sign or the dimension sign, is a mathematical symbol used to denote the operation of multiplication, which results in a product. While similar to a lowercase X (x), the form is properly a four-fold rotationally symmetric saltire.. The symbol is also used in botany, in botanical hybrid names and the Heavy Goods Vehicle industry, to calculate

https://math.stackexchange.com/questions/864606/difference-between-%E2%89%88-%E2%89%83-and-%E2%89%85
In LaTeX it is coded as \cong. ∼ ∼ is a similarity in geometry and can be used to show that two things are asymptotically equal (they become more equal as you increase a variable like n n ). This is a weaker statement than the other two. In LaTeX it is coded as \sim. ≃ ≃ is more of a grab-bag of meaning.

https://www.mathematics-monster.com/symbols/Minus-Sign.html
Example 1: Subtraction of Numbers: When considering the subtraction of two numbers, the − sign is used to indicate the operation. For instance: 7 − 5 = 2 7 − 5 = 2. In this equation, 5 is subtracted from 7 to yield a result of 2. Example 2: Indicating Negative Values: The − sign is also employed to represent negative quantities.

https://en.wikipedia.org/wiki/Table_of_mathematical_symbols_by_introduction_date
1698 (perhaps deriving from a much earlier use of middle dot to separate juxtaposed numbers) ⁄. division slash (a.k.a. solidus ) 1718 (deriving from horizontal fraction bar, invented by Abu Bakr al-Hassar in the 12th century) Thomas Twining. ≠. inequality sign ( not equal to ) unknown. Leonhard Euler.

https://emojipedia.org/warning
A triangle with an exclamation mark inside, used as a warning or alert. This emoji is used prominently within social media platform BeReal's core time-sensitive "⚠️ Time to BeReal ⚠️" push notification. This notification is shown when being prompted to share a photo of themselves and their immediate surroundings, with this notification

https://www.mathsisfun.com/symbols.html
2(a−3) [ ] grouping symbols: 2[ a−3(b+c) ] { } set symbols {1, 2, 3} π: pi: A = π r 2: ∞: infinity: ∞ is endless = equals: 1+1 = 2: ≈: approximately equal to: π ≈ 3.14: ≠: not equal to: π ≠ 2 < ≤: less than, less than or equal to: 2 < 3 > ≥: greater than, greater than or equal to: 5 > 1: √: square root ("radical") √4

https://emojipedia.org/check-mark
A thick check mark / tick displayed on some platforms in a handwritten style. Generally displayed in black. Commonly used in lists to signify completed tasks or verification of a statement of fact. Previously shown in red on Samsung and green on Google and Microsoft . Note: this emoji is not supported in Twitter / X names, to minimize confusion

https://www.grammarly.com/blog/parentheses-and-brackets/
Updated on November 15, 2022 Grammar. Parentheses and brackets are punctuation marks used to set apart certain words and sentences. Parentheses, ( ), are used to add extra information in text, while brackets, [ ], are used mainly in quotations to add extra information that wasn't in the original quote. A common point of confusion in English

https://en.wikipedia.org/wiki/%E2%88%82
The character ∂ (Unicode: U+2202) is a stylized cursive d mainly used as a mathematical symbol, usually to denote a partial derivative such as / (read as "the partial derivative of z with respect to x"). It is also used for boundary of a set, the boundary operator in a chain complex, and the conjugate of the Dolbeault operator on smooth differential forms over a complex manifold.

https://wumbo.net/symbols/dot-operator/
The dot operator symbol is used in math to represent multiplication and, in the context of linear algebra, as the dot product operator. Typically, the symbol is used in an expression like this: 3⋅ 5. In plain language, this expression means three multiplied by five. The interpunct symbol also referred to as the middle dot, dot product symbol

https://emojipedia.org/exclamation-question-mark
A large red exclamation mark (!) and a large red question mark symbol (?) placed side-by-side (!?). Exclamation Question Mark was approved as part of Unicode 3.0 in 1999 and added to Emoji 1.0 in 2015.

https://www.thepunctuationguide.com/slash.html
The one inarguably acceptable use of the slash in formal writing pertains to poetry. The slash, with one space on either side, indicates a line break. In choosing your path in life, you might consider the words of Robert Frost, in his poem "The Road Not Taken": "I took the one less traveled by, / And that has made all the difference.".

https://math.stackexchange.com/questions/1614875/what-does-%E2%89%BC-or-%E2%89%BA-mean
I think it's probably just notation to distinguish the ordering on F F from that on E E. Other acceptable symbols include ⪯ ⪯, ⊑ ⊑, etc. - Remy. Jan 16, 2016 at 21:14. 1. To explain what they mean by X ⪯ Y ⇔ X = X ∧ Y X ⪯ Y ⇔ X = X ∧ Y, they are referring to the Meet of X X and Y Y.

https://www.mathematics-monster.com/symbols/Therefore.html
The ∴ Symbol: "Therefore". The ∴ symbol, often pronounced as "therefore", is widely used in both mathematics and logic. This symbol serves as a shorthand notation indicating a conclusion or a resultant deduction from previously stated facts or premises. This lesson covers its meaning and use, with a couple of illustrative examples.

https://www.mathematics-monster.com/symbols/Tilde-Operator.html
Example 2: Approximation Consider the value of π. Often, for simplicity in calculations, π ∼ 3.14. Here, the tilde indicates that 3.14 is an approximation of π. To wrap up, the ∼ symbol is versatile and widely adopted in various mathematical contexts. Its usage mainly revolves around the concepts of similarity, equivalence, or approximation.

https://en.wikipedia.org/wiki/Sign_(mathematics)
Sign of a number. Numbers from various number systems, like integers, rationals, complex numbers, quaternions, octonions, ... may have multiple attributes, that fix certain properties of a number.A number system that bears the structure of an ordered ring contains a unique number that when added with any number leaves the latter unchanged. This unique number is known as the system's additive

https://math.stackexchange.com/questions/4380266/meaning-of-the-symbol-%E2%89%A1
It can mean "is defined to be equal to" (for which another common symbol is := := ). Another meaning is "is identically equal to" (for example we write sin2 x +cos2 x ≡ 1 sin 2. ⁡. x + cos 2. ⁡. x ≡ 1 to emphasize that this equation holds for all x ∈R x ∈ R (actually for all x ∈C x ∈ C as well)). It can also mean congurence as

https://www.mathematics-monster.com/symbols/Dot-Operator.html
The Dot Operator, symbolized as ⋅ is a mathematical notation frequently employed in various mathematical contexts. One of its primary usages is in vector calculus, where it represents the dot product. Additionally, it can denote multiplication in some scenarios, especially when traditional multiplication signs might be confusing.

https://emojiterra.com/meaning/
Emojis 😃 are small digital images or symbols that express a wide range of meanings and emotions ️ 😣.Also known as pictograms, emojis are now part of our daily communication 📱 and have a significant impact on social media 📷 💬, online messaging 📩, and even in the business world 💼 🌍.. An emoji can have a positive and/or negative meaning or even be ambiguous 🤔 💭.

https://math.stackexchange.com/questions/790019/what-is-the-symbol-%E2%89%99-most-commonly-used-for-in-a-mathematical-or-math-related-co
What is the symbol ≙ most commonly used for in a mathematical or math-related context?. LaTeX produces the symbol with \hateq.; The symbol has Unicode codepoint U+2259.; The respective Unicode code chart shows it with the name ESTIMATES and the annotation = corresponds to.Note that the names and annotations there are often not helpful, incomplete, or even misleading.

https://math.stackexchange.com/questions/2864497/what-does-%E2%A9%94-mean
$\begingroup$ The first 2 paragraphs explain 2 example usages, the third paragraph gives the MathJax for similar characters and the one in question; which in one comment Asaf said there was only an empty block, causing Daniel to include an image instead of relying on MathJax - it is an addition which aids those two and those that arrive here hoping for related information or how to write the