Hello, There seems to be a bug in the int() routine when CPV is being used i.e.

restart;
f1 := (int(t^(2*a - 1)/(-t^2 + 1), t = 0 .. infinity, CPV = true) assuming (0 < a, a < 1));

the result given is

f1 := Pi/(2*sin(Pi*a)*(-1)^(1 - a))

but the correct result is

f1 := Pi/2*cot(Pi*a).

I need to use a remote machine with an outdated Maple 2016. But I have written my own package in Maple 2019 / 2020 on my laptop. When I try to load my code in Maple 2016, I got the error

Error, unexpected export declaration in module body

What are the main changes to the module system in the Maple language since the 2016 version? How should I modify the code to run it successfully? (I encounter no errors for other code which only contains procedures but not modules.)

I create a table of 3D points in one worksheet and would like to use these values at a later time in a separate worksheet.

What is the simplest way to do this?

Download plotting_elements_of_matrix.mw

How to solve these systems of BVP and obtain values for gamma term.

Hi

I was trying to find the inverse of a function where the domain has been restricted. For example

solve(x=subs(x=y, x^2+8*x), y, useassumptions) assuming x::RealRange(-4, Open(infinity));

and my hope was that including the assumption would result in a single solution but it still gives me two solutions as it would without the assumption.

I would like to algorithmically end up with a single solution. Currently I am only working with functions that have variables to the power of 0, 1 or 2 and additionally square roots, but a more general method would be optimal. What am I doing wrong?

Can you use the Dirac function in different coordinate systems?

Dear all

I have a second order PDE, i used pdesolve but no solution obtained, why?

pdsolve_pde.mw

thanks

Is there a way to ask Maple to re-write the expression 

a:=1/3 -exp(-3)/3 into a:=1/3*(1-exp(-3))  ?

The command "factor" doesn't seem to work. Thank you.

Can the number of frames per second be changed programmatically in animate and/or animatecurve ?

Thanks in advance

I should know this, but I don't: Is there a plotting command to plot a list of points, like so:

list:=[[x1,y1],[x2,y2],etc...]; plotlist(list);

(a Vector of points would also be ok)?

There is plots:-pointplot which plots two Vectors (or maybe lists) against each other.

plots:-listplot plots a list against the index. Both are useful commands I employ a lot, but sometimes I'd like to plot pairs as above directly.

Note that I do know how to transform the list of pairs into two lists, or whatever; that is not the issue. I am looking whether there is a command that does this by itself, transparently, before I program myself such a routine because I am too dense with the Maple Help facility.

Thanks,

Mac Dude.

Using insert sequences: `%*`(seq(...))

Behaves very poorly when the sequence has one element. E.g., if this is a double sequence(say a double sum) then when the inner seq/sum has one element the inert visual is poorly displayed with extra junk rather than just showing one element.

`%+`(floor(5 %/ (2 %* 3 %* 5)))

E.g., rathernt han just showing:

(floor(5 %/ (2 %* 3 %* 5)))

Is there any way to get it to play nice without having to modify the functions/(this is a global problem so it deserves a global solution rather than ad-hoc that has to be applied to every usage).

I have some algebraic expression which I want to expand.

I used the ExpandSteps command to show me the steps, but I guess I used it incorrectly.

Attached below the file with the commands.

It should be expanded to -\Delta*\sin^2(\theta), but I want maple to show me the steps.

ExpandSteps.mw
 

Download ExpandSteps.mw

Let A(-2,3,-5),B(-6,1,-1),C(2,-3,7) and point D on BC where the angle  DAB = angle DAC  .Find the equation of line AD?