DifferenceDelta (Built-in Mathematica Symbol)

DifferenceDelta[f, i] gives the discrete difference \[DifferenceDelta]_i f = f(i + 1) - f(i).DifferenceDelta[f, {i, n}] gives the multiple difference DifferenceDelta[f, {i, ...

LineSpacing (Built-in Mathematica Symbol)

LineSpacing is an option for Style and Cell that specifies the spacing between successive lines of text.

HeavisideTheta (Built-in Mathematica Symbol)

HeavisideTheta[x] represents the Heaviside theta function \[Theta](x), equal to 0 for x < 0 and 1 for x > 0. HeavisideTheta[x_1, x_2, ...] represents the multidimensional ...

CCS (Cluster Integration Symbol)

CCS["name"] represents a Windows Compute Cluster Server with the specified name.

HPC (Cluster Integration Symbol)

HPC["name"] represents a Windows High Performance Computing Server with the specified name.

Evaluation > Parallel Kernel ... (Mathematica Menu Item)

Parallel Kernel Configuration opens a dialog to add, remove, and configure parallel kernels.

ChiDistribution (Built-in Mathematica Symbol)

ChiDistribution[\[Nu]] represents a \[Chi] distribution with \[Nu] degrees of freedom.

ScrollingOptions (Built-in Mathematica Symbol)

ScrollingOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for notebooks that specifies settings for scrolling.

Interval Arithmetic (Mathematica Tutorial)

Representations of real intervals. This represents all numbers between -2 and +5. The square of any number between -2 and +5 is always between 0 and 25.

NSum (Built-in Mathematica Symbol)

NSum[f, {i, i_min, i_max}] gives a numerical approximation to the sum \[Sum]i = i_min i_max f.NSum[f, {i, i_min, i_max, di}] uses a step di in the sum.