Editing Maths (section)

==Other==
* ≠ ≈ ≡ ∀ ∃ ∄ ∧ ∨ ¬ ≤ ≥ ≮ ≯ ⇔ ⇒ ∈ ∉ ∌ ∩ ∪ ⊃ ⊂ ⊇ ⊆ ⊢ ⋂ ⋃
* '''∈''' 'is an element of', '''∉''' 'is not an element of', '''∌''' does not contain as a member
* ◅ ▻ - Normal sub group of. ⟨ ⟩ generator.
* x′ - x prime.

* Misc: ∑ π φ ℵ ℶ ω ∞ ∴ ∵ ! ∎ → ↦ ㏒ * ∥ ∦ θ

* 𝓋⃗, v⃗ - Vector 𝓋 + (U+20D7).
* ∅ - Empty set
* δ - [https://en.wikipedia.org/wiki/Kronecker_delta Kronecker Delta]
* ∏ - Product over (Like ∑). ∐ for [https://en.wikipedia.org/wiki/Coproduct coproduct].
* '''⊤ / ⊥''' - True / False
* '''∖''' - Set minus.
* '''σ''' - Selection
* '''↔⇔≡''' - If and only if.
* '''⇒''' - If A is true then B must be true.
* '''ℜ(z)''', '''ℑ(z)''' - Return the real & imaginary parts of a complex number.
* {♠, ♦, ♥, ♣} 
* '''↪''' - [https://en.wiktionary.org/wiki/%E2%86%AA Embedding]... 𝒻: 𝐗↪𝐘. 𝒻 is the identity map, taking 𝓍∈𝐗 to 𝓍∈𝐘 and 𝐗⊂𝐘. Maybe 'lift'.
* '''↣''' - 𝒻: 𝐗↣𝐘 is an injective function from 𝐗 to 𝐘. '''Injection'''.
* '''↠''' - 𝒻: 𝐗↠𝐘, [https://en.wiktionary.org/wiki/↠ ↠ is a surjection] ([https://math.stackexchange.com/questions/46678/what-are-usual-notations-for-surjective-injective-and-bijective-functions possibly] only an 'onto' '''surjection'''. See also [https://en.wikipedia.org/wiki/Surjective_function#Definition this.] and [http://homepages.math.uic.edu/~jyang06/stat401/handouts/handout2.pdf pdf]
* '''≡''' - '''Congruence'''. 23 ≡ 45 (mod 11)

* |𝐴|×|𝐵|

* [https://en.wikipedia.org/wiki/Geometric_Shapes Wikipedia: Unicode Geometric Shapes]