Hi, would appreciate some help. Is there any command in Maple that would hep check general SARIMA equations? for instance, if we take the following model (0,1,0)*(1,1,1)_5, then the general SARIMA equation will be: (1 - K)*(1-K^5)*X_t = (1 + B*K)*(1+B*(K^5))*Z_t i.e. X_t - X_(t-1) - X_(t-5) + X_(t-6) = Z_t + B*Z_(t-1) + B*Z_(t-5)+ B*Z_(t-6) Is there any option in Maple that would allow me to check if this equation is correct? many thanx.

Hi, Would appreciate some help regarding testing Euler's method in Maple. I have the following function: dy/dt = - 3*y, y(0)=2, delta t =0.2. Is there a programme in Maple that would allow to test this method by performing iterations / plotting a graph? Have already tried Maple help. Thanx in advance. antonio

hi, i am trying to show that the sum of (1/2 + 2/3 + 3/4 + 4/5 + ... +n*(n+1)+ ...) can be approximated by the following: sum(1/(exp(1))^(1/n), n = 1 .. infinity). e.g. > sum(1/exp(1/n), n = 1 .. 10); print(1/exp(1)+1/exp(1/2)+1/exp(1/3)+1/exp(1/4)+1/exp(1/5)+1/exp(1/6)+1/exp(1/7)+1/exp(1/8)+1/exp(1/9)+1/exp(1/10)); 1 1 1 1 1 1 1 1 1 ------ + ------ + ------ + ------ + ------ + ------ + ------ + ------ + ------ exp(1) /1\ /1\ /1\ /1\ /1\ /1\ /1\ /1\

hi, would appreciate some help in checking limit series in Maple using d'Alembert's test for convergence (if it's possible). the only limits I can get in Maple is either ∞ or 0 (and I need to be more specific). thanx a lot!

Hi, I need to construct a heap using a list. Have found this in Maple help. > h := (heap[new])(lexorder, greg, tony, bruno, michael); (heap[insert])(stefan, h); stefan > (heap[size])(h); 5 > (heap[max])(h); tony > while `not`((heap[empty])(h)) do (heap[extract])(h) end do; tony stefan michael greg bruno