\[LessSlantEqual] (Mathematica Character Name)

Unicode: 2A7D. Alias: Esc </ Esc. Infix operator with built-in evaluation rules. x ⩽ y is by default interpreted as LessEqual[x,y].

\[Nand] (Mathematica Character Name)

Unicode: 22BC. Alias: Esc nand Esc. Infix operator with built-in evaluation rules. x ⊼ y is by default interpreted as Nand[x,y].

\[Nor] (Mathematica Character Name)

Unicode: 22BD. Alias: Esc nor Esc. Infix operator with built-in evaluation rules. x ⊽ y is by default interpreted as Nor[x,y].

\[Piecewise] (Mathematica Character Name)

Unicode: F361. Alias: Esc pw Esc. Prefix operator with built-in evaluation rules. Grid[{{e_1, c_1}, {e_2, c_2}}] is by default interpreted as ...

\[RightCeiling] (Mathematica Character Name)

Unicode: 2309. Alias: Esc rc Esc. Matchfix operator with built-in evaluation rules. ⌈ x ⌉ is by default interpreted as Ceiling[x]. Extensible character.

\[RightFloor] (Mathematica Character Name)

Unicode: 230B. Alias: Esc rf Esc. Matchfix operator with built-in evaluation rules. ⌊ x ⌋ is by default interpreted as Floor[x]. Extensible character.

\[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].

Arbitrary-Precision Calculations (Mathematica Tutorial)

When you use //N to get a numerical result, Mathematica does what a standard calculator would do: it gives you a result to a fixed number of significant figures. You can also ...

Unconstrained Optimization (Mathematica Overview)

Introduction Methods for Local Minimization Methods for Solving Nonlinear Equations