6 years, 69 days

## Dear @tomleslie, you are right. The...

Dear @tomleslie, you are right. The Maple numeric method is more accurate than my method.

What are the simple methods for finding maximum relative error, and max. absolute error at the interval?

## Thanks, @vv,  This is relativ...

Thanks, @vv

This is relative error, right?

How to find max. absolute error at the interval?

## Dear @Carl Love, thanks for your fe...

Dear @Carl Love, thanks for your feedback.

1- You are right, I corrected the post.

2- I removed local variable K.

3- Yes, it must be "*". I corrected it, too.

4- phii is not an external procedure. I corrected it as you say. (  phi[n, m+s-2*j](t) )

I think the multiplication is commutative and also the matrix  is a symmetric matrix.

## Dear @tomleslie, thanks for your in...

Dear @tomleslie, thanks for your interest.

I think I am a misunderstanding. So, I edited the question.

After finding matrices by hand, we can write maple code for the matrices like you (Thanks again). But I want to find the matrices M,C,K etc. from the directly from the following equation by Maple.