truncated power series form of a formal series
tpsform(p, var, order)
name of a formal power series
variable to be used in the truncated series
(optional) number of terms to which resulting series should be accurate (this defaults to the global variable Order)
The function tpsform(p, var, order) creates a truncated power series (a series data structure) in var. This truncated series is equal to p up to, but not including, the term containing x^order.
In some cases tpsform can determine when the series is exact and so it drops the O⁡xorder term. Formal power series created using powpoly fall into this category.
The command with(powseries,tpsform) allows the use of the abbreviated form of this command.
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