The function laurent computes the Laurent series expansion of f, with respect to the variable x, about the point a, up to order n.

The laurent function is a restriction of the more general series function. See series for a complete explanation of the parameters.

If the result of the series function applied to the specified arguments is a Laurent series with finite principal part (i.e. only a finite number of non-negative powers appear in the series) then this result is returned; otherwise, an error-return occurs.

The command with(numapprox,laurent) allows the use of the abbreviated form of this command.