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powseries[subtract] - subtraction of two formal power series
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Calling Sequence
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subtract(a, b)
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Parameters
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a, b
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formal power series
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Description
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The function subtract(a, b) returns the formal power series in which each coefficient is the corresponding coefficient of a minus the corresponding coefficient of b.
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This function yields the same result as powadd(a, negative(b)), but is faster.
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The command with(powseries,subtract) allows the use of the abbreviated form of this command.
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