$DateStringFormat gives the default format to use for date strings generated by DateString.

The Notation Package allows you to extend Mathematica so it understands and functions correctly with new typeset notations. Typically, new notations are defined by ...

Clear[symbol_1, symbol_2, ...] clears values and definitions for the symbol_i. Clear["form_1", "form_2", ...] clears values and definitions for all symbols whose names match ...

DownValues[f] gives a list of transformation rules corresponding to all downvalues defined for the symbol f.

MatrixQ[expr] gives True if expr is a list of lists or a two-dimensional SparseArray object that can represent a matrix, and gives False otherwise. MatrixQ[expr, test] gives ...

PrimeQ[expr] yields True if expr is a prime number, and yields False otherwise.

VectorQ[expr] gives True if expr is a list or a one-dimensional SparseArray object, none of whose elements are themselves lists, and gives False otherwise. VectorQ[expr, ...

Converting between symbols and their names. Here is the symbol x. Its name is a string.

Special-purpose multiprocessing hardware comes in two types, shared memory and distributed memory. In a shared-memory machine, all processors have access to a common main ...

The introduction of Mathematica 6 in 2007 represented a revolutionary redefinition of Mathematica. Arriving only 18 months after Mathematica 6, Mathematica 7 represents ...