ComposeSeries

ComposeSeries[, , ... ] composes several power series.

ComposeSeries[, , ... ] effectively replaces the variable in by and so on.

Two series can only meaningfully be composed when the point about which the first series is expanded corresponds to the limiting value of the second series at its expansion point.

See The Mathematica Book: Section 3.6.4.

See also: InverseSeries.

Further Examples