It's sad when a bug is found for such a simple problem!

sys := [x*y*z = 0, x*y*z + x*z + z = 0, x*y*z + x*y + x = 0]:
solve(sys, {x,y,z});    # OK
#         {x = 0, y = y, z = 0}, {x = x, y = -1, z = 0}

solve(sys, [x,y,z]);    # ???
#                               []

Hi,

Happy New Years All

Can anyone explain two document formating features I am trying to implement?

1.)  Sections.  I select numbering with follow previous selected and I get three sections with a 1. in front of them vs 1, 2, 3.  

I would expect Technical to become 3.1 when properly following Section 3. header.   Also, I have seen how to manually type the section number, but that seems to defeat the document layout and formatting if it gets "jumbled up". 

2.)  Headers.   Can you suppress headers on pages 2 through X to have a unique cover page header?   This would be similar to word (headers and footers linked to previous section, or not(?) with section breaks as new pages)

Thanks,
Bill

hello 
i have a long proc i am defining in a loop inside the proc for some reason it calculates the value of a1[j+1] and a2[j+1] and assigns it(in the case of the picture j=1 and in j=2 it doesnt sub) but when it is called again in the next iteration  it doesnt sub the value it just calcluated ! 
i would be so thankful for any help ive been stuck on this for a while now 

I installed the cloud version of Syrup with xmaple, by clicking the cloud icon, etc. It is loaded with xmaple and cmaple. But, not in maple running in emacs.

with(Syrup);
(**) Error, invalid input: with expects its 1st argument, pname, to be of type
{module, package}, but received Syrup
(**) 

Tom Dean

It has been a decade or more since I have seen an option for lifetime enrollment for anything. Does maple calculator even have such an option available? If not, why not?

When the new Beta application center becomes active and the old one is obsoleted (sigh) many links to the applications centers from here (mapleprimes) will be broken.  Or will the links be directed to the proper location?

In this example, i have a top module A. Inside it, I have module named my_RECORD (which happened to be option object) that I want to return back to caller when they call a proc.

Maple allows me to declare the proc to return my_RECORD. No problem., But when making a local variable inside the proc and using o::my_RECORD it complains  that my_RECORD does not exist. 

The solution is to change o::my_RECORD to o::A:-my_RECORD

My question why it did not complain the same way on the return value on the proc?   for me, they are both semantically the same. One says the proc returns this type, and the other says the local variable is this type. So why had to do A:-my_RECORD on one but not the other? 

Here is an example. Maple 2021.2 on windows 10.

Download A_no_lib.mw

hi,

I looked at the file mapleflowrc and saw that it lists several palettes that are not visible in the workshheet dock.

Does anyone know if these palettes are available in mapleflow? And if so, how to make them visible in the worksheet dock?

thanks very much in advance.

I often create diagrams in Maple and export them so I can embed them in a Word Doc.  Lately, when I right-click on the picture so I can select "export," the entire program closes.   It seems to happen more when the picture is in 3D.   Am I doing something wrong?     Thanks.

           David

Hi, I am trying to enter into the Mini-Course Computer Algebra for Physicists from the help, but instead of going to the page I get the help page of Physics[FeynmanIntegral]. Can anyone confirm that this happens to them on Maple 2021.2?

Kevin

Sorry to bother moderators again but a question from @panke has just disappeared.
I browsed its old questions but found none in a recent past related to the one removed.
Can you please tell me where it has been moved ?

TIA

PS: I understand perfectly the need to avoid multiple occurrences of a same thread, but in case of the displacement of a question, couldn't a systematic message be sent?

But ODEsteps supports simliar ODEs (see attached).
Is the ODESteps command not generic enough to cover the pendulum or have I missed something?

ODESteps.mw

I can't move files in the navigator window anymore in Maple 2021.2.

Anyone else with the same problems?

Other than saving few bytes of memory, why would one use ::static for methods of Object?

I found that if I use ::static, then I have to add prefix _self:- each time an object data member is referenced anywhere, making the code very hard to read.

Imagine having to write  _self:-x + 3* _self:-x^2 + 2* _self:-y^3 and so on all the time, instead of just x+3*x^2+2*y^3. (where it is assumed here that x,y happened to be object private data members and not local variables for a proc inside the module).

But then I found if I remove  ::static now _self:- no longer needed and can still get the benefit of using the object and the code works as before, but the code is now much more readable. 

I know that by not using static, then a copy of each method is made for each new object.

I am OK with that. As I do not use that many objects any way (few at a time before GC cleans the ones I used).

But the benefit of much more readable code far outweights the little extra memory needed, and memory is cheap these days anyway. I got lots of RAM. An extra few MB's is not a big deal.

What Am I missing here? Why does all the Maple help and documenation say that one should use static for object methods then? But do not mention that by not using static:: then the code will become more readable since _self:- is not needed to be appeneded to each variable or method name.

Here is an example below to compare. 

First example uses ::static methods, and the second does not.

One can see the difference The code is more clear in the second.   Is there something else I am overlooking by not using ::static . I am still learning OOP in Maple, and could be overlooking something else. I definitly do not want to code using _self:-variable_name all the time if I have to use OOP in Maple as it makes the code hard to read. 

Notice that in both examples, and for the exported methods, I used _self as first argument. This is OK. This is meant to allow client of the object to call it using object:-method() syntax which is what I prefer instead of method(object,....). syntax.

I am talking about the execssive use of _self internal to the module/object code when having to use ::static. methods.

Download OOP.mw

Hi, I'm trying to solve auxilary equation to find its familes but I don't know what I'm doing wrong as I'm using following code:

famtemp := (diff(z(xi), xi))^2-a*z(xi)^2-b*z(xi)^3-c*z(xi)^4;

fam1 := simplify(`assuming`([dsolve(famtemp)], [b::real, a::real, c::real, -4*a*c+b^2 > 0, a > 0]))

I want to get the following family:

fam1 := 2*a*sech(sqrt(a)*xi)/(sqrt(-4*a*c+b^2)-b*sech(sqrt(a)*xi));

I hope someone will help me to solve it.

Thanks