\[UpTeeArrow] (Mathematica Character Name)

Unicode: 21A5. Infix arrow operator. x ↥ y is by default interpreted as UpTeeArrow[x,y]. Extensible character.

\[UpTee] (Mathematica Character Name)

Unicode: 22A5. Alias: Esc uT Esc. Infix relational operator. x ⊥ y is by default interpreted as UpTee[x,y]. Used in geometry to indicate perpendicular. Used in number theory ...

\[WarningSign] (Mathematica Character Name)

Unicode: F725. Letter-like form. Used in yellow to indicate messages and other warnings in the default style for Mathematica notebooks. Based on an international standard ...

\[Xnor] (Mathematica Character Name)

Unicode: F4A2 Alias: Esc xnor Esc. Infix operator with built-in evaluation rules. x  y is by default interpreted as Xnor[x,y].

\[Xor] (Mathematica Character Name)

Unicode: 22BB. Alias: Esc xor Esc. Infix operator with built-in evaluation rules. x ⊻ y is by default interpreted as Xor[x,y].

Help > Welcome Screen... (Mathematica Menu Item)

Welcome Screen opens the Welcome Screen, which appears by default each time you start Mathematica.

CapitalDifferentialD (Built-in Mathematica Symbol)

CapitalDifferentialD[x] displays as \[CapitalDifferentialD]x.

ComplexityFunction (Built-in Mathematica Symbol)

ComplexityFunction is an option for Simplify and other functions which gives a function to rank the complexity of different forms of an expression.

GreaterEqualLess (Built-in Mathematica Symbol)

GreaterEqualLess[x, y, ...] displays as x \[GreaterEqualLess] y \[GreaterEqualLess] ....

LessEqualGreater (Built-in Mathematica Symbol)

LessEqualGreater[x, y, ...] displays as x \[LessEqualGreater] y \[LessEqualGreater] ....