Dear all

I possess an integral function that is multiplied by an accompanying coefficient. How can I automatically isolate and extract the coefficient that appears outside the integral function?

extract_coef_before_integral.mw

Thank you

`lprint` is officially interpreted as “linear printing of expressions”, but in the most recent release, its output looks just like "left printing" (under the default zoom 100%), 

while in some legacy version, `lprint` printed expressions not only on the left but also on the right. 

How to render `lprint` print its arguments not only on the left half?
Although I believe that similar questions must have been asked before, I cannot find such a question. 

Code: 

lprint(_bigPi):
showstat(ellipsoid)

How I can solve this, because I can't find the solutions. The display show "Length of output exceeds limit of 1000000"

Please help me.. 

This is my model on picture

Hello everyone! Hope you´re doing fine. For work I have to compare two terms with each other and say which one is greater. I did this by hand but it would be very helpful if maple could do this for me. I made some asummptions about the parameters and used the evalb command but unfortunately maple had no answer for me. I also used the is command but this didn´t work either. 

Can someone please tell me what i am doing wrong or if maple can do this at all?
Many thanks!!

Best wishes
Hahn

 Maple_Forum_Help_(1).mw

Hello,

Best wishes for this new year.

Horner's algorithm for polynomials is considered more efficient in terms of the number of operations.
However, numerous comparisons (search for real or complex roots, calculations of hundreds of values...)
with Maple on polynomials of high degrees (10,12...) show, for me, no significant difference in times of execution evaluated with the st-time() command.

Has this point already been covered?
Are there specific situations where using the "horner" conversion is relevant with Maple?

Thank you for your clarification.

Best regards.

Let M a block matrix, for instance:

restart:
S := [a, b, c, d]:
M := Matrix(2$2, (i, j) -> Matrix(2$2, symbol=S[2*(i-1)+j]))

It is quite simple to transform M into a 4x4 Matrix P with elements 

P[1, 1] = a[1, 1], P[1, 2] = a[1, 2], P[1, 3] = b[1, 1], ..., P[4, 4]= d[2, 2]

But does it exist a built-in Maple function which does this "unfolding"?

Thanks in advance

Something happens when I redefine an indexed value of a table, but I'm not sure what.

Here's the situation before the definition.

eval(WhateverYouNeed["calculations"]["structure"]["connection"]);

TABLE(["Cutright1" = "false", "graindirection1" = 90 Unit(arcdeg), "Cutleft2" = "false",  "lengthleft2" = 500 Unit(mm), "Cutrightsteel" = "false", "lengthleftsteel" = "false", "lengthleft1" = 350 Unit(mm), "lengthright2" = 500 Unit(mm), "connection_1" = "Timber", "lengthrightsteel" = "false", "connection_2" = "Timber", "Cutleft1" = "false", "Cutleftsteel" = "false", "graindirection2" = 0, "graindirectionsteel" = "false", "Cutright2" = "false", "lengthright1" = 150 Unit(mm), "connection_InsideLayers" = 1])

I then try to redefine one specific entry of the table.
WhateverYouNeed["calculations"]["structure"]["connection"]["connection_1"] := GetProperty("ComboBox_connection_1", 'value');

WhateverYouNeed["calculations"]["structure"]["connection"]["connection_1"] := "Timber"

Which gives this new result.

eval(WhateverYouNeed["calculations"]["structure"]["connection"]);

TABLE(["connection_1" = "Timber"])

The rest of the indices and entries of the "connection" table is gone.

I am looking for something like that but in 3d.

My question is twofold:

- What, in general, are "good" ways to do this? I am surprised that I haven't found anything better than the Boing Ball. Patterns of billard balls might be an alternative if the balls are well oriented at the start of an animation/simulation.

- How can spheres be patterned in Maple? I looked at: plots,obsolete,sphereplot(deprecated), plottools,sphere, and plots,conformal and MaplePrimes for examples but did not find anything to build on. 

Patterns that might not be too complicated to implement:

• globe with meridians and chessboard pattern,
• ball with a punched belt,
• ball with 2 or 3 crossed belts
• ...

Any thoughts on this topic?

Update: Change of orientation of the angular velocity while the sphere is spinning is an important visualisation aspect. I added this to the title.

I've reported this to Maplesoft 6 months ago.

I was wondering if someone with beta version of 2024 could check if these are fixed? (if one is allowed to do so). As these errors keep breaking my program. (not possible to trap).

Download in_simplify_rootof_too_many_level_of_recursion_jan_6_2024.mw

Is there any Maple command equivalent to Mathematica StreamPlot command?

Thank you.

I was about to update an older discussion with the information that the context pannel now contains an entry "Normalized Expanded".

I only remember that I was participating with another user.

So, I tried C_R AND other_user in the search field. This gives an error.

A space as an implict AND operator does also not work.

In previous versions of Maple for the Macintosh, I would often request output in LaTeX format and use the Maple.sty that Maplesoft provided. In the current version, I am unable to retrieve from my directory the current version for Maple.sty --- could someone please provide a link to the LaTeX Maple.sty file that I can incorporate into my output for LaTeX processing of Maple calculations? Many thanks, William

As I assumed 'n' and 'm' are real, eta is complex. But still, there is a bar on these discrete independent variables. Secondly, the substitution of (8) applies in some terms of 'r2', and the remaining terms remain as is it.

Download soldis.mw

Maple dsolve allows one to specify the algorithm to use to solve the ode. But sometimes it is very tricky to figure the syntax,

This ode 

ode:=diff(y(x),x)*y(x)+a*x*y(x)+b*x^3=0;
DEtools:-odeadvisor(ode);

Gives

               [[_homogeneous, `class G`], _rational, [_Abel, `2nd type`, `class A`]]

I wanted now to call dsolve telling dsolve to use the first method above. But how? All the following syntax failed for me

sol:=dsolve(ode,['_homogeneous, `class G`']);
sol:=dsolve(ode,'[_homogeneous, `class G`]');

All return method not found .

I am sure I am using wrong syntax but do not know what the correct one should be.

infolevel[dsolve]:=5;
sol:=dsolve(ode);

gives

Methods for first order ODEs:
--- Trying classification methods ---
trying a quadrature
trying 1st order linear
trying Bernoulli
trying separable
trying inverse linear
trying homogeneous types:
trying homogeneous G
<- homogeneous successful

With long solution printed now OK. 

When using just '[homogeneous]' it works

sol:=dsolve(ode,'[homogeneous]');

It gives same solution as default case.

What is the correct syntax to tell dsolve to use specific method [_homogeneous, `class G`] ? i.e. I need to add class G

The reason I ask is becuase Maple have different kind of homogeneous method as described here

Maple 2023.2.1 on windows 10

restart;
with(LinearAlgebra);
b := Matrix(3, 6, [[-1/2, 0, 1/2, 0, 0, 0], [0, 0, 0, -1/2, 0, 1/2], [0, -1/2, -1/2, 1/2, 1/2, 0]]);
i want  to show like this