Unicode: 2210. Alias: Esc coprod Esc. Infix operator. x ∐ y is by default interpreted as Coproduct[x,y]. ∐ x is by default interpreted as Coproduct[x]. Coproduct is used as ...

Unicode: 224D. Infix similarity operator. x ≍ y is by default interpreted as CupCap[x,y]. Used in mathematics for various notions of equivalence, usually fairly weak. f ≍ g ...

Unicode: 2250. Alias: Esc .= Esc. Infix similarity operator. x ≐ y is by default interpreted as DotEqual[x,y]. Used to mean approximately equal, or in some cases, 'image of', ...

Unicode: 22A8. Infix operator. x ⊨ y is by default interpreted as DoubleRightTee[x,y]. x ⊨ y ⊨ z groups as x ⊨ (y ⊨ z). Used in mathematics to indicate various strong forms ...

Unicode: 2193. Infix arrow operator. x ↓ y is by default interpreted as DownArrow[x,y]. Used to indicate monotonic decrease to a limit. Sometimes used for logical nor. ...

Unicode: 03C2. Alias: Esc fs Esc. Greek letter. Used in written Greek when σ occurs at the end of a word. Not commonly used in technical notation. Not the same as \[Stigma].

Unicode: 2194. Alias: Esc <-> Esc. Infix arrow operator. x ↔ y is by default interpreted as LeftRightArrow[x,y]. Used in mathematics for various notions of equivalence and ...

Unicode: 22A3. Alias: Esc lT Esc. Infix operator. x ⊣ y is by default interpreted as LeftTee[x,y]. x ⊣ y ⊣ z groups as (x ⊣ y) ⊣ z. Used in mathematics to indicate the lack ...

Unicode: 22B2. Infix ordering operator. x ⊲ y is by default interpreted as LeftTriangle[x,y]. Used in pure mathematics to mean 'normal subgroup of'.

Unicode: 266E. Letter-like form. Used to denote musical notes. Sometimes used in mathematical notation, often as an inverse of numbering operations represented by \[Sharp].