KroneckerDelta (Built-in Mathematica Symbol)

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.

Mesh (Built-in Mathematica Symbol)

Mesh is an option for Plot3D, DensityPlot, and other plotting functions that specifies what mesh should be drawn.

TagSet (Built-in Mathematica Symbol)

f /: lhs = rhs assigns rhs to be the value of lhs, and associates the assignment with the symbol f.

Making Definitions for Functions (Mathematica Tutorial)

"Defining Functions" discusses how you can define functions in Mathematica. In a typical case, you would type in f[x_]=x^2 to define a function f. (Actually, the definitions ...

TetGenGetElements (TetGenLink Package Symbol)

TetGenGetElements[expr] gets the elements in a TetGen expression.

TetGenGetNeighbors (TetGenLink Package Symbol)

TetGenGetNeighbors[expr] gets the neighbors in a TetGen expression.

GroupElements (Built-in Mathematica Symbol)

GroupElements[group] returns the list of all elements of group.GroupElements[group, {r_1, ..., r_k}] returns the elements numbered r_1, ..., r_k in group in the standard ...

Reference (Library Link Tutorial)

Wolfram LibraryLink allows dynamic libraries to be directly loaded into the Mathematica kernel so that functions in the libraries can be immediately called from Mathematica. ...

Array (Built-in Mathematica Symbol)

Array[f, n] generates a list of length n, with elements f[i]. Array[f, {n_1, n_2, ...}] generates an n_1*n_2*... array of nested lists, with elements f[i_1, i_2, ...]. ...

Perform Operations on Subgroups of Data (Mathematica How To)

When summarizing data, it is often useful to analyze it by subgroup. For example, crop yields could be categorized by seed variety, or average patient recovery time by ...