## 1152 Reputation

12 years, 127 days

## Testing for a complex number...

Maple

I need to test a list of numbers to find if any of them are complex. if a complex is found then remove that complete row from the list. the potential complex numbers in my list are a, b and c. b is complex i.e has a non zero imaginery part in row 1 so only row 1 should get deleted. the a b and c were originally generated from the arcsin function. Would appreciate help on this. I know it should be simple enough to do. Thanks in advance.

## Equation substitution problem...

Maple

I have a set of test equations. I am substituting the coefficients of the variables A1 ..A4 and the constants in the equations. Most of this I have made work fine. There are 2 coefficients I cand make be substituted. In eq1 k*d the coefficient of A3 and eq5 3.1d2 also the coeff of A3 .Have tried subs and algsubs but can't make it work. The reason I want to do this is in reality I have 15 equations...

## Dividing a multivatiate polynomial...

Maple 15

I have a rather large multivatiate polynomial "Dtest"  I need to divie it by a cubic poly "DGm" using rem and quo. Both are determinants multiplied out,  both given below. Have spent the past 2 nights trying to sort, collect, expand, equate coefficients plex groebner etc. Am trying to collect up all the powers of c3 but cant anything to work. even expand doesn't fully expand "Dtest". If I set c1 and c2 to 1 things are...

## Polynomial division...

Maple

Can you divide 2 polynomials with Real coeffs.   eg 1.87x3-2x2+5.789x- 3,2 by    1.5 x2+2x-1.4 to get the quotient and remainder? If so how?

## assigning values...

Maple

I have these as outputs from comparing the coefficients. How do i assign the g2xyz totheir associated numbers.

eg at present g2000 is g2000. I need it to be 1.2e7. And so on down the list.

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