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://en.wikipedia.org/wiki/Glossary_of_mathematical_symbols
Glossary of mathematical symbols. A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various

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://altcodeunicode.com/alt-codes-math-symbols-operators/
Alt 11007. 2AFF Alt X. N-ary white vertical bar, n-ary Dijkstra choice. &#11007. &#x2AFF. U+2AFF. For more math signs and symbols, see Alt Codes for Math Symbols. For the the complete list of the first 256 Windows Alt Codes, visit Windows Alt Codes for Special Characters & Symbols. How to easily type mathematical operator signs (∃ ∛ ∴

https://en.wikipedia.org/wiki/Triple_bar
Without proper rendering support, you may see question marks, boxes, or other symbols. The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Its main uses are in mathematics and logic. It has the appearance of an equals sign = with a third line.

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://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://en.wiktionary.org/wiki/%E1%BA%8B
ẋ. ( mathematics) The differential of x, using Newtonian calculus notation; the x-component of the velocity.

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://en.wiktionary.org/wiki/%E2%86%94
left or right, leftward or rightward. ( logic) material equivalence; if and only if. ( computing) adjustable in horizontal direction. ( architecture) size in horizontal direction, width.

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 com

https://www.mathsisfun.com/symbols.html
Symbols save time and space when writing. Here are the most common mathematical symbols

https://wumbo.net/symbols/minus/
The minus symbol is used in math to represent subtraction. Typically, the symbol is used in an expression like this: In plain language, this expression represents 6 minus 5. Note, the code point of this character is different from the hyphen symbol (-) on the keyboard even though they are usually used to mean the same thing. The minus symbol is

https://emojipedia.org/slightly-smiling-face
A yellow face with simple, open eyes and a thin, closed smile. Conveys a wide range of positive, happy, and friendly sentiments. Its tone can also be patronizing, passive-aggressive, or ironic, as if saying This is fine when it's really not. Slightly Smiling Face was approved as part of Unicode 7.0 in 2014 and added to Emoji 1.0 in 2015.

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://emojipedia.org/left-arrow
An arrow, pointing left. See the glossary for information on the term black in unicode character names. Left Arrow was approved as part of Unicode 4.0 in 2003 under the name "Leftwards Black Arrow" and added to Emoji 1.0 in 2015.

https://math.stackexchange.com/questions/2864497/what-does-%E2%A9%94-mean
In the language "R" the operators "|" and "&" indicate the logical operations OR and AND, but the longer form evaluates left to right examining only the first element of each vector. Source: "Logical operators in R". In the language JavaScript bitwise operators ("|" and "&") treat their operands as a sequence of 32 bits (zeroes

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/1614875/what-does-%E2%89%BC-or-%E2%89%BA-mean
2. 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. Commented. 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. You have x ∧ y = z ⇔ z

https://emojipedia.org/cross-mark?ref=blog.emojipedia.org
Cross Mark. A large red cross mark, displayed in the shape of a letter X and similar to a multiplication sign. Cross Mark was approved as part of Unicode 6.0 in 2010 and added to Emoji 1.0 in 2015.