I did not get 0 (zero) as an answer when I execute the commands below. Maple version 11.02 on WinXP. >restart: >sum(1/(n^4+1), n = -infinity .. infinity); sum(1/(n^4+1), n = -infinity .. infinity) >evalf(%); 2.156955159 Regards, Georgios Kokovidis Dräger Medical

Thanks for the info. Maybe the Browse issue is localized to the Windows platforms. I will keep playing with the Matrix, matrix, Vector and vector commands to get a better understanding with regards to manipulating the outputs. Regards, Georgios Kokovidis Dräger Medical

I don't know if this is a bug or not. It might have to do with what the function 'expand' is designed to do. I replaced 'expand' with 'normal' and everything turned out as you expected. It could be that your functions evaluate to something with a sqrt(-1) and expand does not handle this condition. See the help pages for 'expand' and 'normal' for a more detailed explanation of this. Regards, Georgios Kokovidis Dräger Medical

Maple has built in routines for animating functions of 1 or 2 variables. See ?animate, ?animatecurve, ?animate3d for examples of each. Not all animations are functions of variables, as in your case. Your animation is a sequence of frames, one after another. Kind of like watching a movie. A more powerful method of creating animation frames is to use the seq command along with the display command. There are plenty of examples here on Mapleprimes. Take a look at the one below for an example of using the seq command in an animation. http://www.mapleprimes.com/forum/animation-of-archimedes-screw Regards, Georgios Kokovidis Dräger Medical

Maple has built in routines for animating functions of 1 or 2 variables. See ?animate, ?animatecurve, ?animate3d for examples of each. Not all animations are functions of variables, as in your case. Your animation is a sequence of frames, one after another. Kind of like watching a movie. A more powerful method of creating animation frames is to use the seq command along with the display command. There are plenty of examples here on Mapleprimes. Take a look at the one below for an example of using the seq command in an animation. http://www.mapleprimes.com/forum/animation-of-archimedes-screw Regards, Georgios Kokovidis Dräger Medical

Try taking the integral of the function below using the tutor. If you work through a standard calculus text for fun, you will certainly encounter more. For a large class of calculus problems like the one below, I prefer pencil and paper. x*exp(x)/(x+1)^2 Regards, Georgios Kokovidis Dräger Medical

Your problems arise because of the 2D vs. 1D maple input. I am assuming your are using the GUI interface and not the classic. Either way, you can alter the input mode from 2D to 1D. Your subscript problem goes away if you do this. The package linalg has been superseded by LinearAlgebra. I do not see a package called DifferentialAlgebra, but if it did exist, then it would supersede the diffalg package. You should use the new packages over the old. Regards, Georgios Kokovidis Dräger Medical

Adding the following to the beginning of your worksheet >st:=time(): and this at the end >time()-st; yields the following time on my laptop (2GHz pentium w/ 512 M Ram). 0.721 How much time is it taking on your machine? The issue w/ Maple 10 seems to be a bug. The same error message pops up regardless of Classic or Gui interface. Maple 11 gives an answer with both interfaces. Regards, Georgios Kokovidis Dräger Medical

I use the Page Up key on my key board to quickly get to the top of a thread after I have scrolled all the way to the bottom. This is on a Win PC running the Firefox browser. Not as elegant as a button or link but it is very fast. Regards, Georgios Kokovidis Dräger Medical

Solve it how? I do not see an equation. Are you trying to simplify the expression. If so, you can do it like this: >simplify((54*x*y^3)/(15*x^2*y)); 18/5/x*y^2 Regards, Georgios Kokovidis Dräger Medical

I lose the kernel connection with the non classic interface, with ver. 10 and 11. Regards, Georgios Kokovidis Dräger Medical

I lose the kernel connection with the non classic interface, with ver. 10 and 11. Regards, Georgios Kokovidis Dräger Medical

It looks like the problem arises when a user is logged in. When I tried it and it worked, I was not logged in. Now that I am, it does not work for me either. Regards, Georgios Kokovidis Dräger Medical

It works for me using Firefox and WinXP. Maybe it got fixed over the past half hour. Regards, Georgios Kokovidis Dräger Medical

007, cut and paste the code below into your worksheet to get an idea of what this function looks like. Then the comments above will make more sense to you. >restart: >with(plots): >g := (x,y,z) -> 49*x + 24*y + 37*z - 3778171; >implicitplot3d(g(x,y,z)=0,x=-1000000..1000000,y=-1000000..1000000, z=-1000000..1000000,axes=boxed); Regards, Georgios Kokovidis Dräger Medical