Reverse[expr] reverses the order of the elements in expr. Reverse[expr, n] reverses elements at level n in expr.Reverse[expr, {n_1, n_2, ...}] reverses elements at levels ...

EdgeQ[g, e] yields True if e is an edge in the graph g and False otherwise.

Normal[expr] converts expr to a normal expression, from a variety of special forms.

SolveAlways[eqns, vars] gives the values of parameters that make the equations eqns valid for all values of the variables vars.

SystemsModelDimensions[sys] gives the number of inputs and outputs of a StateSpaceModel or TransferFunctionModel object sys.

Building on the concept of symbolic data description, Mathematica 6.0 introduced the major new "elements" framework for handling import and export of data, in nearly a ...

Links[] gives a list of all MathLink connections that are currently open. Links[patt] lists only links whose names match the specified string pattern.

OddQ[expr] gives True if expr is an odd integer, and False otherwise.

Exact symbolic results are usually very desirable when they can be found. In many calculations, however, it is not possible to get symbolic results. In such cases, you must ...

LinearSolve[m, b] finds an x which solves the matrix equation m.x == b. LinearSolve[m] generates a LinearSolveFunction[...] which can be applied repeatedly to different b.