That worked perfectly, thanks a lot! I guess the Maple GUI would need some refinements for novices like me!

That worked perfectly, thanks a lot! I guess the Maple GUI would need some refinements for novices like me!

I should have mentionned that in my first post. I tried eval as well and I got the same results, surprisingly...

I should have mentionned that in my first post. I tried eval as well and I got the same results, surprisingly...

@Preben Alsholm This is exactly what I needed, you're a life saver and I begin to understand how Maple works. Thanks a lot.

@Preben Alsholm This is exactly what I needed, you're a life saver and I begin to understand how Maple works. Thanks a lot.

Thanks a lot for your answer. In fact, I don't want to solve the equation, but simply make it look better (this is to check my calculation). Furthermore, my H is defined as the derivative of a function with respect to the m_i, which are functions of t, and maybe I was doing things the wrong way but Maple didn't accept what I suggested to him. Therefore, I decided to discard the variable t and keep only the small perturbations of the m_i as variables.

Attached is my worksheet so that you can understand if you have just some time (as well as my initial problem which was not clearly explained!) Now, I have everything that I want, but I'm looking for a way to:

- linearise the last result (i.e. keep only constant terms, x-terms, y-terms, z-terms and discard all the multiple variable terms). I checked on the online help and I could only found a Linearize function that works for systems, not really what I'm looking for.

- group the terms so that the result looks like: (constant terms) + (coefficients)*x + (coefficients)*y + (coefficients)*z. Is there any of doing so easily?

Again, thanks a lot for your help.

Download resonance.mw

Thanks a lot for your answer. In fact, I don't want to solve the equation, but simply make it look better (this is to check my calculation). Furthermore, my H is defined as the derivative of a function with respect to the m_i, which are functions of t, and maybe I was doing things the wrong way but Maple didn't accept what I suggested to him. Therefore, I decided to discard the variable t and keep only the small perturbations of the m_i as variables.

Attached is my worksheet so that you can understand if you have just some time (as well as my initial problem which was not clearly explained!) Now, I have everything that I want, but I'm looking for a way to:

- linearise the last result (i.e. keep only constant terms, x-terms, y-terms, z-terms and discard all the multiple variable terms). I checked on the online help and I could only found a Linearize function that works for systems, not really what I'm looking for.

- group the terms so that the result looks like: (constant terms) + (coefficients)*x + (coefficients)*y + (coefficients)*z. Is there any of doing so easily?

Again, thanks a lot for your help.

Download resonance.mw