CityData (Built-in Mathematica Symbol)

CityData["name", " property"] gives the value of the specified property for the city with the specified name.CityData["name"] gives a list of the full specifications of ...

Optional (Built-in Mathematica Symbol)

p : v is a pattern object that represents an expression of the form p, which, if omitted, should be replaced by v.

Relational and Logical Operators (Mathematica Tutorial)

Relational operators. This tests whether 10 is less than 7. The result is False. Not all of these numbers are unequal, so this gives False.

Matrix-Based Minimization (Mathematica Guide)

GXL (Mathematica Import/Export Format)

GXL graph data format. Used for the storage and exchange of graphs. GXL is an acronym derived from Graph Exchange Language. XML-based format. Represents typed, attributed, ...

ComplexExpand (Built-in Mathematica Symbol)

ComplexExpand[expr] expands expr assuming that all variables are real. ComplexExpand[expr, {x_1, x_2, ...}] expands expr assuming that variables matching any of the x_i are ...

Quaternions Package (Quaternions Package Guide)

EllipticLog (Built-in Mathematica Symbol)

EllipticLog[{x, y}, {a, b}] gives the generalized logarithm associated with the elliptic curve y^2 = x^3 + a x^2 + b x.

DeleteCases (Built-in Mathematica Symbol)

DeleteCases[expr, pattern] removes all elements of expr that match pattern. DeleteCases[expr, pattern, levelspec] removes all parts of expr on levels specified by levelspec ...

OneIdentity (Built-in Mathematica Symbol)

OneIdentity is an attribute that can be assigned to a symbol f to indicate that f[x], f[f[x]], etc. are all equivalent to x for the purpose of pattern matching.