# Order of variable for simplification

Let's say I have two variables x, q. When I use simplify_full(), how do I make sure the final expression is ordered as monomial of X instead of q? For example, let f=q^2+x+1, g=qx+1. Somehow if I use simplify_full() to simplify fg, then the monomial is of the following form (expression in terms of x)q^3+(expression in terms of x)q^2...

But actually I regard x as the variable, q as power of prime number. So I wish to order the expression like: (expression in terms of q)X^2+(expression in terms of q)X+(expression in terms of q)

Thanks!

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( 2021-11-17 11:47:03 +0100 )edit

( 2021-11-17 11:47:17 +0100 )edit

@slelievre Thanks! I just edited the question.

( 2021-11-17 17:19:15 +0100 )edit

Great. You might even include the code you have so far.

( 2021-11-17 17:25:56 +0100 )edit

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I guess you should use

(f*g).expand().collect(x)


See x.collect? for more information.

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Last updated: Nov 17 '21