composition of formal power series
formal power series
The function compose(a, b) computes and returns the formal power series a⁡b, the composition of a and b. This power series is: a⁡0+a⁡1⁢b+a⁡2⁢b2+a⁡3⁢b3+....
Note that b⁡0 must be 0 to ensure that the composition is well defined. Otherwise, compose returns an error message.
The command with(powseries,compose) allows the use of the abbreviated form of this command.
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