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I have downloaded the zip file for CalcP7, unzipped it, and can access its commands in a worksheet after issuing the command with(CalcP7), but "No Matches Found" displays when entering the command ?CalcP7. The download included a file named "aplication" (one "p") of type HDB, but Maple15 can't seem to access its contents.

Are CalcP7's help pages displayable? If so, what is necessary to access them?

I have had no trouble downloading the user package DirectSearch and accessing both its commands and its help pages.

Can anybody where I can find collection of third party Maple packages?

One site that I know is

http://cpc.cs.qub.ac.uk/

Regards

Found a strange behaviour in Mapke 2015 of the sqrt-function after loading the GRTensor package:

the square-root of a non-square integer, e.g. sqrt(5), does not terminate. 5^(1/2) instead works fine.

Can be reproduced with Maple 18, but not with Maple 11.

I consider this a serious bug, as it makes any expressions containing such roots useless.

As it worked with Maple 11 I am inclined to see it as your fault.

 

Is there a simple way to see wich packages that I have loaded, without being forced to see thru the entire document?

I have Maple package "DESOLVE" having two different types of files namely in format .mpl and .mws, where code is written in .mpl file and .mws is just a example worksheet, this package is available at following link;

http://cpc.cs.qub.ac.uk/summaries/ADYZ_v1_0.html

My problem is how to work with package?

One thing that I able to do is that I have opened the file type .mpl  in Maple worksheet and after executing whole whorsheet I able to to start working with package using with(desolv).

But when I type with(desolv) in new worksheet an error shows up.

How I can store this .mpl file in Maple library so as to use this package using "with(desolv)" in new worksheets

Desolv_worksheet_paper.mws?

Dear all

I have downloaded a third party Maple package from following link:

http://cpc.cs.qub.ac.uk/summaries/AEQP_v1_0.html

The distribution format is  "tar.gz", but I don't know what to with this format, that how should I load this package into Maple library. I have window 8.1.

If anybody have an idea about this format "tar.gz" please help me out.

I have run into a "funny" feature of 2-D input: It seems to convert something like k/2 into this k*`^`(2,-1). While this would often not be an issue (it is correct after all), it becomes a problem when used in an argument list to a procedure. It becomes even more of a problem when, by chance, I have overloaded `^` to act on specific types that I have defined.

Let me try to explain briefly. I have a package called "Lattice" that does whatever it does (not of relevance here). I am writing a little manual for this package, for which I use 2-D input so I can write it in Maple and have the examples right in it and "live".

Here is what happens:

with(Lattice) # load the package

QFh:=Quad(0,kf/2) # Define an element for Lattice

Error, invalid input: Lattice:-`^` expects its 1st argument, element, to be of type Element, but received 2

Copy-pasting kf/2 into a 1-d worksheet, I get

QFh := Quad(0, kf*Lattice[`^`](2, -1));

So it uses Lattice[`^`] which actually appears to bypass the overload I have in the Lattice package. `^` is defined like this in Lattice:

`^`:=proc(element::Element,n::algebraic) option overload; # Element is a defined type in Lattice
...
end proc;

How can I possibly rewrite `^` to fall-back to Maple's ^ operator when called as Lattice[`^`] ?? I know there is a function overload() but have no experience with it. Would it even help?

Or am I missing something completely here? I do not use 2-D input for my usual work, but in this case I want and need to use it. The reason for its bizarre rewrite of "/2" is beyond me. Note that I can replace /2 by *0.5; but that causes problems later on for algebraic work as 1/2 is not 0.5 in Maple. I tried *1/2 but that has the same problem.

Has anyone a clean solution for this? I assume this effect is not limited to my own package but would affect others as well.

M.D.

PS: I ran into this using Maple 15 but I doubt it is specific to this particular version.

Here's a simple package for drawing knot diagrams and computing the Alexander polynomial. A typical usage case for the AlexanderPolynomial function is when a knot needs to be identified and only a visual representation of the knot is available. Then it's trivial to write down the Dowker sequence by hand and then the sequence can be used as an input for this package. The KnotDiagram function also takes the Dowker sequence as an input.

 

TorusKnot(p, q) and PretzelKnot(p, q, r) are accepted as an input as well and can also be passed to the DowkerNotation function.

 

The algorithm is fairly simple, it works as follows: represent each double point as a quadrilateral (two 'in' vertices and two 'out' vertices); connect the quads according to the Dowker specification; draw the result as a planar graph; erase the sides of each quad and draw its diagonals instead. This draws the intersections corresponding to the double points and guarantees that there are no other intersections. The knot polynomial is then computed from the diagram.

 

The diagrams work fairly well for pretzel knots, but for certain knots they can be difficult to read because some of the quads around the double points can become too small or too skewed. Also, the code doesn't check that the generated quadrilaterals are convex (which is an implicit assumption in the algorithm).

 

knot.txt

knot.mw

read "c:/math/prg/maple/knot.txt"

_m489214528

(1)

with(Knots)

[AlexanderPolynomial, DowkerNotation, KnotDiagram]

(2)

AlexanderPolynomial([6, 8, 10, 2, 4], t)

t^4-t^3+t^2-t+1

(3)

AlexanderPolynomial([4, 10, 14, 12, 2, 8, 6], t)

3*t^2-5*t+3

(4)

AlexanderPolynomial([6, 18, 16, 14, -20, 4, 2, 22, 12, -8, -10], t)

2*t^6-11*t^5+24*t^4-31*t^3+24*t^2-11*t+2

(5)

KnotDiagram([10, 12, -20, -16, -18, 2, 22, 24, -8, -4, -6, 14])

 

AlexanderPolynomial([10, 12, -20, -16, -18, 2, 22, 24, -8, -4, -6, 14], t)

t^10-t^9-t^8+6*t^7-11*t^6+13*t^5-11*t^4+6*t^3-t^2-t+1

(6)

AlexanderPolynomial([4, 8, 10, 16, 2, 18, 20, 22, 6, 14, 12], t)

2*t^6-11*t^5+25*t^4-31*t^3+25*t^2-11*t+2

(7)

DowkerNotation(TorusKnot(5, 4))

[-24, -10, 20, -30, -16, 26, -6, -22, 2, -12, -28, 8, -18, -4, 14]

(8)

KnotDiagram(TorusKnot(5, 4))

 

AlexanderPolynomial(TorusKnot(p, q), t); 1; simplify(subs([p = 5, q = 4], %))

(t^(p*q)-1)*(t-1)/((t^p-1)*(t^q-1))

 

t^12-t^11+t^8-t^6+t^4-t+1

(9)

DowkerNotation(PretzelKnot(3, -4, 5))

[-16, -14, 20, 22, 24, 18, -4, -2, 10, 12, 6, 8]

(10)

KnotDiagram(PretzelKnot(3, -4, 5))

 

AlexanderPolynomial(PretzelKnot(p, q, r), t)

piecewise(p::odd and q::odd and r::odd, piecewise(p*q+p*r+q*r <> -1, (1/4)*signum(p*q+p*r+q*r+1)*((p*q+p*r+q*r)*(t^2-2*t+1)+t^2+2*t+1), 1), AlexanderPolynomial(PretzelKnot(p, q, r), t))

(11)

eval(%, [p = 3, q = -4, r = 5])

2*t^8-3*t^7+2*t^6-t^5+t^4-t^3+2*t^2-3*t+2

(12)

 

Download knot.mw

knot.txt

On the Physics Research and development page there are only 3 versions of the Physics package available.  What happened to the earlier final updates for Maple 16, 15 etc...

What is the latest one that can work on Maple12?  Was there one for M12?  What is the earliest versions of Maple the Research & Development Physics packages can work on?

Hello 

Does any one have the package DESOLV not deslove , I need it with its help file.

 

Carl Love 9260

hi

how can I download Fourier series package?

I have few packages downloaded from following link:

http://cpc.cs.qub.ac.uk/

Following are packages that I need to install on Maple:

Rif: For differential elimination.

GeM: For computing symmetries and conservation laws for nonlinear PDEs.

wkptest: For symbolic computation of Painleve test for nonlinear PDEs.

My problem is to install these packages onto Maple, but I do not know how to do this. For example, the package Rif contains file like maple.hdb, maple.ind, maple.lib, but I do not know what to do with these files. I shall be grateful to auduience of Mapleprime if somebody can help me on this.

I created my own package and one procudure inside this package is to calculate the eigenvalues of a identity matrix, as shown below

 

 

 

Then, I use this package in another document, all other procedures work well except the procedure calculating egigenvalues, as shown below

 

 

 

How to solve this problem? Thank you.

I want to make a package that I have created work with the LinearAlgebra package that comes with Maple. My package loads into a worksheet fine, but when I try to use one of my procedures, most of which depend upon procedures in the Linear Algebra package, the executable part of my procedure from my package is simply echoed to the screen and not executed. If I then copy the echoed part to a command prompt then it executes fine. How do I make my package use the commands in the Linear Algebra package?

I have three procedures with calling struture:

A(argseq) 

    > call B (argseq)

    > call C (argseq)

     > etc code

     > return results

end A()

Procedures A, B, C are defined in a single MAPLE .mw worksheet, and each time I use them I have to reload them by pressing return.

Please can you suggest the best course of action?  I have been reading about modules but am not certain that A knows about B and C in the dame module when it calls them

Can anyone help please?

MRB

 

 

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