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powseries

  

subtract

  

subtraction of two formal power series

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

subtract(a, b)

Parameters

a, b

-

formal power series

Description

• 

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.

• 

This function yields the same result as powadd(a, negative(b)), but is faster.

• 

The command with(powseries,subtract) allows the use of the abbreviated form of this command.

Examples

withpowseries:

powcreatetn=tn1n,t0=1:

powcreatevn=vn12,v0=1:

ssubtractv,t:

tpsforms,x,6

12x14x2124x3+148x4+11480x5+Ox6

(1)

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