KroneckerDelta[n_1, n_2, ...] gives the Kronecker delta \[Delta] Subscript[n, 1] Subscript[n, 2] ..., equal to 1 if all the n_i are equal, and 0 otherwise.

LibraryFunctionUnload[fun] unloads a LibraryFunction so that it cannot be used.

Mathematica gives you immediate access to many details of your Mathematica session—in the form of symbolic expressions that can readily be manipulated by the Mathematica ...

HeavisidePi[x] represents the box distribution \[CapitalPi](x), equal to 1 for |x| < 1/2 and 0 for |x| > 1/2.HeavisidePi[x_1, x_2, ...] represents the multidimensional box ...

TextureCoordinateFunction is an option to Plot3D and similar functions that specifies a function that computes texture coordinates.

Building on its broad strengths in mathematics in general, and in special functions in particular, Mathematica provides a unique level of support for analytic number theory, ...

ProductLog[z] gives the principal solution for w in z == w e^w. ProductLog[k, z] gives the k\[Null]^th solution.

LibraryUnload[lib] unloads all functions that have been loaded from a Wolfram Library, then it unloads the library.

Mathematica has many special features that optimize the entry and editing of both ordinary text and Mathematica input in notebooks.

Expressions are the main type of data in Mathematica. Expressions can be written in the form h[e_1,e_2,…]. The object h is known generically as the head of the expression. ...