https://math.stackexchange.com/questions/864606/difference-between-%E2%89%88-%E2%89%83-and-%E2%89%85
$\approx$ is used mostly for the approximate (read: calculated) value of a mathematical expression like $\pi \approx 3.14$ In LaTeX it is coded as \approx. $\cong$ is used to show a congruency between two mathematical expressions, which could be geometrical, topological, and when using modulo arithmetic you can get different numbers that are congruent, e.g., $5 \text{ mod } 3 \cong 11 \text

https://en.wikipedia.org/wiki/List_of_typographical_symbols_and_punctuation_marks
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.

https://mathvault.ca/hub/higher-math/math-symbols/algebra-symbols/
A comprehensive collection of 225+ symbols used in algebra, categorized by subject and type into tables along with each symbol's name, usage and example. lgebra is a subfield of mathematics pertaining to the manipulation of symbols and their governing rules. The following is a compilation of symbols from the different branches of algebra, which

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://emojipedia.org/smiling-face
A classic smiley. A yellow face with a modest smile, rosy cheeks, and soft, closed eyes. Many platforms, including Apple, feature relaxed eyebrows. Conveys a wide range of warm, positive feelings, including love, happiness, and gratitude. Similar to 😊 Smiling Face With Smiling Eyes, which has a broader smile, no eyebrows, and smiling eyes.

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://www.mathsisfun.com/symbols.html
4×3 = 12: ÷: divide: 20÷5 = 4 / divide: 20/5 = 4 ( ) grouping symbols: 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 > ≥

https://en.wikipedia.org/wiki/Division_sign
The division sign (÷) is a mathematical symbol consisting of a short horizontal line with a dot above and another dot below, used in Anglophone countries to indicate the operation of division.This usage, though widespread in some countries, is not universal and the symbol has a different meaning in other countries. Its use to denote division is not recommended in the ISO 80000-2 standard for

https://en.wiktionary.org/wiki/%E2%89%88
Eric Weisstein, Wolfram Mathworld, "Approximately Equal": If two quantities A and B are approximately equal, this is written A ≈ B. Synonyms: ~=, ≅. ( topology) Homeomorphic to.

https://www.mathematics-monster.com/symbols/Tilde-Operator.html
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. It's an efficient way to convey these concepts without the need for verbose explanations.

https://math.stackexchange.com/questions/846707/what-does-%E2%88%88-mean
answered Jun 23, 2017 at 4:58. Srishti Chauhan Srishti Chauhan. 69 1 1 silver badge 2 2 bronze badges $\endgroup$ 1 $\begingroup$ "contains" and "lies in" are also a very bad words to use here, as it refers to inclusion, not set membership-- two very different ideas. $\endgroup$ - richard1941. Commented Nov 10, 2019 at 3:21.

https://www.mathsisfun.com/algebra/symbols.html
not equal to. π ≠ 2. < ≤. less than, less than or equal to. 2 < 3. > ≥. greater than, greater than or equal to. 5 > 1. ⇒.

https://science.howstuffworks.com/math-concepts/basic-math-symbols.htm
In the number 3.6, the placement of the 3 indicates that is the whole part of the number; the 6 is to the right of the decimal in what we call the "tenths place," meaning it is 6/10 of 1. If you had 3.6 cookies, you would have 3 and 6/10 total cookies. Additional digits after the decimal have their own place value.

https://www.wikiwand.com/en/List_of_typographical_symbols_and_punctuation_marks
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters. For other languages and symbol sets, see below

https://us.sofatutor.com/math/videos/inequality-symbols
Basics on the topic Inequality Symbols: <, >, ≤, ≥. Inequality symbols are a shorthand notation used to compare different quantities. There are four inequality symbols "greater than", "less than", "greater than or equal to", and "less than or equal to". So, for instance, the sentence "5 is greater than 2" can be written

https://www.thoughtco.com/common-mathematic-symbols-2312232
Here is a list of the most common symbols used in mathematics . Symbol. What It Represents. +. Adding sign: Often referred to as the plus sign or the addition sign. -. Subtracting sign: Often referred to as the minus sign. x. Multiplication sign: Often referred to as the times or times table sign.

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://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/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://math.stackexchange.com/questions/3958074/what-is-the-meaning-of-%E2%8A%8A
3 Answers. Short answer: A ⊊ B A ⊊ B means that A A is a subset of B B and A A is not equal to B B. Long answer: There is some confusion on mathematical textbooks when it comes to the symbols indicating one set is a subset of another. It's relatively clear what the symbol " ⊆ ⊆ " means. This symbol is more or less universally understood

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.