MaplePrimes - Unanswered Questions

Wrong root of sinc expression

C_R — Sat, 25 Apr 2026 08:27:51 Z

Here is another case where an incorrect solution of a non-algebraic expression is returned.

How to make Maple exclude solutions obtained with allsolutions where the expression is not defined?

IMO, allsolutions facilities of Maple should do this automatically. Anything from a mathematical point of view that speaks against an automatic exclusion?

(Are there other commands that provide a correct solution?)

By the way:

solve(sin(x)/x)

does not return a single solution as stated on the solve help page ("In general for transcendental equations, the solve command returns only one solution,...") because solve correctly discards x=0 but does not consider returning x=pi.

(1)

The above expression is not defined at

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Error, (in value/Eval) numeric exception: division by zero

Roots of the expression with RootOf

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Originally _Z1, renamed _Z1~:
is assumed to be: integer

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The above should be false because is not defined for However, this is what automatic simplifcation does behind the scenes with the output (7)

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For this particular case Maple should have returned a special name expressing nonzero integers, like .
or or are common symbols for that
So is incorrect in the solution and automatic simplification does something wrong.
Only substituing everything at once leads to a correct response:

Error, numeric exception: division by zero

Solve

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Error, numeric exception: division by zero

Again is not a valid solution for the first solution butworks for the second solution

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Substituing everything at once works

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However, the second solution does not cover all solutions (it misses even multiples of π)

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Related topic: I also think that new users and students should profit from a directly understandable output like this

Maybe adding new convert form is an option.

Download roots_of_sinc.mw

license error starting OpenMaple session

goebeld — Fri, 24 Apr 2026 13:44:22 Z

I do have a stundent license permanently and I've installed the OpenMaple java examples: JCEngineCallBacks, JCHelpCallBack, jcmaple in Eclipse.

I've also installed the MapleTest.java which runs fine.

When I start the jcmaple.java I get the error: license communication problem 1 Error starting OpenMaple session

So I don't know why.

Meanwhile I was able to solve the issue

Maximizing, with a constraint

Alfred_F — Mon, 20 Apr 2026 14:31:08 Z

...and starting values. I want to reproduce the maximum in Maple using the solution structure in the attached file, similar to the old Mathcad method. Instead of using the Euler-Lagrange equation, I want to separately enter the objective function, then the boundary conditions, and finally the starting values for an iteration (as was done in the old Mathcad solution block). I entered the latter into the "maximize" command using the Maple help text. But nothing is being calculated. What am I doing wrong? As I said, I only want a numerically generated approximate solution.test.mw

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Download test.mw

Shortcut to enter colon-dash?

C_R — Thu, 16 Apr 2026 10:26:20 Z

The command completion facility is real time saver. On the other hand, entering the colon dash is not fluent since it requires searching the keys on the key board.

I was wondering if there is a keyboard shortcut that enters both characters at once.

Replacing placeholder names in nested RootOfs

C_R — Wed, 08 Apr 2026 05:32:52 Z

Is there an easier or shorter way to do the following? Any handy package command?

Related question: Is that substitution mathematically correct or does the _a belong to the outermost RootOf?

Download parameters_in_nested_RootOf.mw

Substitution in pde with conjugate?

salim-barzani — Tue, 07 Apr 2026 21:28:05 Z

most of time is give me true my substittuetion but a lot time i saw it is not make my substittuetion true and this time i figure out which author did and outcome is what i am looking but when i do that is so different where is problem

f-m.mw