\[SucceedsSlantEqual] (Mathematica Character Name)

Unicode: 227D. Infix ordering operator. x ≽ y is by default interpreted as SucceedsSlantEqual[x,y].

\[SucceedsTilde] (Mathematica Character Name)

Unicode: 227F. Infix ordering operator. x ≿ y is by default interpreted as SucceedsTilde[x,y].

\[SupersetEqual] (Mathematica Character Name)

Unicode: 2287. Alias: Esc sup= Esc. Infix set relation operator. x ⊇ y is by default interpreted as SupersetEqual[x,y].

\[TildeFullEqual] (Mathematica Character Name)

Unicode: 2245. Alias: Esc ~== Esc. Infix similarity operator. x ≅ y is by default interpreted as TildeFullEqual[x,y]. Used in mathematics to indicate isomorphism, congruence ...

\[UpArrowBar] (Mathematica Character Name)

Unicode: 2912. Infix arrow operator. x ⤒ y is by default interpreted as UpArrowBar[x,y]. Extensible character.

\[UpArrowDownArrow] (Mathematica Character Name)

Unicode: 21C5. Infix arrow operator. x ⇅ y is by default interpreted as UpArrowDownArrow[x,y]. Extensible character.

\[UpDownArrow] (Mathematica Character Name)

Unicode: 2195. Infix arrow operator. x ↕ y is by default interpreted as UpDownArrow[x,y]. Extensible character.

\[UpEquilibrium] (Mathematica Character Name)

Unicode: 296E. Infix arrow-like operator. x ⥮ y is by default interpreted as UpEquilibrium[x,y]. Extensible character.

\[UpperLeftArrow] (Mathematica Character Name)

Unicode: 2196. Infix arrow operator. x ↖ y is by default interpreted as UpperLeftArrow[x,y]. Extensible character; grows by default to limited size.

\[UpperRightArrow] (Mathematica Character Name)

Unicode: 2197. Infix arrow operator. x ↗ y is by default interpreted as UpperRightArrow[x,y]. Extensible character; grows by default to limited size.