TimeUsed (Built-in Mathematica Symbol)

TimeUsed[] gives the total number of seconds of CPU time used so far in the current Mathematica session.

Defining Numerical Values (Mathematica Tutorial)

If you make a definition such as f[x_]:=value, Mathematica will use the value you give for any f function it encounters. In some cases, however, you may want to define a ...

BesselJZero (Built-in Mathematica Symbol)

BesselJZero[n, k] represents the k\[Null]^th zero of the Bessel function J_n (x).BesselJZero[n, k, x_0] represents the k\[Null]^th zero greater than x_0.

Why You Do Not Usually Need to Know ... (Mathematica Tutorial)

Most of the documentation provided for Mathematica is concerned with explaining what Mathematica does, not how it does it. But the purpose of this is to say at least a little ...

Solve an Equation (Mathematica How To)

Mathematica has many powerful features which enable you to solve many kinds of equations.

Test Problems (Mathematica Tutorial)

All the test problems presented in [MGH81] have been coded into Mathematica in the Optimization`UnconstrainedProblems` package. A data structure is used so that the problems ...

Method (Built-in Mathematica Symbol)

Method is an option for various algorithm-intensive functions that specifies what internal methods they should use.

Variables and Starting Conditions (Mathematica Tutorial)

All the functions FindMinimum, FindMaximum, and FindRoot take variable specifications of the same form. The function FindFit uses the same form for its parameter ...

Sow (Built-in Mathematica Symbol)

Sow[e] specifies that e should be collected by the nearest enclosing Reap. Sow[e, tag] specifies that e should be collected by the nearest enclosing Reap whose pattern ...

Working with Special Functions (Mathematica Tutorial)

Some common operations on special functions. Most special functions have simpler forms when given certain specific arguments. Mathematica will automatically simplify special ...