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Maple 18 and MapleNet 2015.

Show/Hide Contents allows one to hide certain elements of the worksheet. Is there a way settings there (or somewhere) can be locked so that another user is prevented from seeing certain elements of the worksheet?

Rationale: As an example: I'd like my students to use Maple Player to interact with a worksheet, using Maple Component GUI elemnts. I do not want them to see all the code behind that, and in fact explicitly want to rule them seeing some function definitions. I can hide "input, output" when I create the document, but under "View" in Maple Player, the intrepid student could always unhide that and see the code.


Concerning the 3D visualization of my multibody systems, in the visualization windows, i can see both :
- the display of geomtry of the elements which has been defined as simple forms (as cylindrical geometry)
- the display of the geometry of the elements where the display of the geometry has been defined with CAD.

However, concerning the 3D animation, i have only see the components where the display of the geometry is defined as simple forms (as cylindrical geometry).

Have you some ideas why I can not see the elements which has been defined with CAD ?

For your information, the CAD geometries have been defined with STL files and, in the CAD geometry component, I let the box "Transparent" empty.

Thank you for your help

We find recent applications of the components applied to the linear momentum, circular equations applied to engineering. Just simply replace the vector or scalar fields to thereby reasoning and use the right button.

(in spanish)



y'(t)=1-y'(t-y(t)^2 /4),      t>=0

with initial function

y(t)=1+t,   0<=t<=1

please solve

Developed and then implemented with open code components. It is very important to note this post is held for students of civil engineering and mechanics. Using advanced mathematical concepts to concepts in engineering.

(in spanish)








Hi all.

I am using Maple2015.

I typed in as input y=x/sqrt(1-x^2).

I hit enter.  The output is:


I know the 2 answers are equivalent.

My question is why did Maple swap 1-x^2 to -x^2+1???

Any advice to swap it back would be greatly appreciated.


I need to prepare for a final exam for a introdutory computer science course in Maple.
My professor gives us mutliple choice questions, short answer questions and wiritng some codes.

what is the most efficient way to study for my final exam? or how should i study for an computer science exam. I am not really use to preparing for such a course. 

Are there any websites that i can practice multiple choice questions?

I would appreciate any advice.


Thank you very much.

Here we have a very brief introduction to the use of embedded components, but effective for the study of the polynomials in operations and some products made with maple 2015 to strengthen and raise the mathematics today.

(in spanish)



Why the command


coeff(sum(x^i,i=0..999)^500,x,2) prints


Error, unable to compute coeff??


I believe, that memory/cpu issues are not a relevant answer here.



coeff(sum(x^i,i=0..998)^500,x,2) gives the correct result.


coeff(sum(x^i,i=0..998)^500,x,200) is ok.

How do I compute coeffs of longer sums?Or why this limitation is imposed by Maple Server?

How to avoid the error described in the title


Here we have an application to understand how algebraic expressions, calculating degrees relative abosulutos polynomial operations and introduction to work.Here we have an application to understand how algebraic expressions, calculating degrees relative abosulutos polynomial operations and introduction to work.

(in spanish)





Hi, I build my simulation system in MapleSim, using the module 'Stepper Permanent Magnet' like this


But when I run this system, I get the followiing error:

System is underdetermined


When I delete the part about 'Stepper Permanent Magnet', the system runs well.

How to solve this problem? How to use 'Stepper Permanent Magnet'?

The Help file of MapleSim cannot proviod such help information.

Thank you.





With this application we can meet safety characteristics of a relationship and simple or compound functions. Made with maple 2015.

(in spanish)



I need to model some spherical joints with damping.

Apparently, contrary to revolute joints, it seems that it is not possible to add damping in spherical joints. Indeed, contrary to the revolute joint where there is an option to put spring or damping element, i don't find this option in the spherical joint. 

Do you have a idea to model spherical joints with damping (without changing the spherical joint)?

Thanks a lot for your help


I was trying to find the solution for two theta variables in a couple of simultaneous equations (infact this is an iverse kinematics problem for a two link system pendulum).
The following are the initial inputs/equations to be manipulated:

Then I use the folowing command to rearrange for the theta values which I am after:

which gives me the result:

This is all fine until I give in values for l1, l2, x and y:


I have a RootOf in there with a _Z term poping up here and there. I know that this configuration of the two link mechanism in fact dows have a solution and that these numbers are reasonable. Thus I have three questions:

Why does this happen?
What does the "signum" mean here?
how do I go about getting the nummerical values?

Many thanks,
- pjf

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