DiracDelta (Built-in Mathematica Symbol)

DiracDelta[x] represents the Dirac delta function \[Delta](x). DiracDelta[x_1, x_2, ...] represents the multidimensional Dirac delta function \[Delta](x_1, x_2, ...).

ActionMenu (Built-in Mathematica Symbol)

ActionMenu[name, {lbl_1 :> act_1, lbl_2 :> act_2, ...}] represents an action menu with label name and with items labeled lbl_i that evaluates the expression act_i if the ...

Introduction to Systems of ODEs (Mathematica Tutorial)

Systems of ODEs are important in various fields of science, such as the study of electricity and population biology. Like single ODEs, systems of ODEs can classified as ...

Controlling the Precision of Results (Mathematica Tutorial)

In doing numerical operations like NDSolve and NMinimize, Mathematica by default uses machine numbers. But by setting the option WorkingPrecision->n you can tell it to use ...

CompiledFunction (Built-in Mathematica Symbol)

CompiledFunction[args...] represents compiled code for evaluating a compiled function.

RankedMin (Built-in Mathematica Symbol)

RankedMin[list, n] gives the n\[Null]^th smallest element in list.

New in 7.0: Data Manipulation (Mathematica Guide)

Building on Mathematica's unified symbolic architecture, Mathematica 7 introduces several major new integrated forms of data manipulation—including large-scale support for ...

Return (Built-in Mathematica Symbol)

Return[expr] returns the value expr from a function. Return[] returns the value Null.

RankedMax (Built-in Mathematica Symbol)

RankedMax[list, n] gives the n\[Null]^th largest element in list.

DiscreteIndicator (Built-in Mathematica Symbol)

DiscreteIndicator[x, x_1, {u_1, u_2, ...}] yields the discrete indicator function, equal to 1 if x = x_1 and 0 if x = u_i for any i.