## 70 Reputation

7 years, 158 days

## sign expression...

Maple 12

i want to know the sign of all the coefficient of CharacteristicPolynomial of such matrix, can anyone help me to do this ?

calcul_determinant.mw

## can anyone help me to find the error...

Maple 12

 >
 (1)
 >
 (2)
 >
 (3)
 >
 Error, invalid input: eval expects its 2nd argument, eqns, to be of type {integer, equation, set(equation)}, but received Inter
 >

## can I find equality between the two memb...

Maple

sys.pdf

Can  anyone help me to proof that this solution is the right solution to this system ?

## matrix eigenvalues...

Maple 12

can anyone help me to calculate the exact  value of the eigenvalues of this matrix:

## can anyone explain to me this result ?...

Maple

i want to reverse this list using seq : :L := [2, 1, -7, 8];

when i try this way it works: seq(L[i], i = nops(L) .. 1, -1) but this way doesn't work :seq(L[nops(L)-i], i = 1 .. nops(L)), can anyone explain to me why ?

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