Maple 13 Questions and Posts

These are Posts and Questions associated with the product, Maple 13

Hi MaplePrimes,

As an amataeur with this computer tool, I want to know the arrow notation.

For example " l -> 8*l ".

I'm sure this easy question is okay.





HI Maple primes.  We try to make sense of 'rsolve' in the Maple world.  What is command for source code?





Hi Mapleprimes,

We know that '' rsolve '' is a recurrence equation solver.  It is more than an expression simplifier.

Congratulations to the Maple computer algebra team for creating such a great computer tool.  simply want to know more.


Surely there are many steps to determine the values to place.




Hi Mapleprimes,,,

We see Maple file.


We are aware of

sequence data

0 2
1 4
2 16
3 48
4 160
5 512
6 1664
7 5376
8 17408
9 56320
10 182272
11 589824
12 1908736
13 6176768
14 19988480
15 64684032
16 209321984


Where F(m)=2*F(m-1)+4*F(m-2).

Goal - to increase refereed database.


Matthew Charles Anderson

Legislative Assistant

Oregon USA

Age 42.

Dear please check once it showing an error as intial value is not conververging

Dear sir,

I tried to solve a fourth order problem. But I got the error message as better to use midpoint method. Can I know what is midpoint method and here I uploading the problem please verify it if I did anything mistake?

Hi Mapleprimes,

I wrote some quick maple code -

for a from 1 to 10 do
if isprime(a)=false then print(ifactor(a)) else print('1',a) end do;
end do

I want to use the factors command to reproduce

Can anyone help me with this?




Hi everybody,

The Collatz conjecture can be used to give students a taste of a topic in Number Theory.  See the Wikipedia article for a good explaination.

Also, a conjecture is something that is probrably true.  Enjoy my little Maple procedure.  (in .mw and .pdf forms)


Comments are appreciated.



HI MaplePrimes,

Is the Goldbach Weak Conjecture proven?

Consider odd primes p, q, and r.  The question is, Is the sum p+q+r sufficient to reach all odd numbers greater than 9?

See -'s_weak_conjecture

I tried an example.





My code :

> restart; with*PDEtools;

> PDE := diff(u(x, t), `$`(t, 2)) = 4*(diff(u(x, t), `$`(x, 2)));

> pdsolve({PDE, u(x, 0) = cos((1/2)*x), (D[1](u))(x, 0) = 0}, u(x, t));

And i get Error, (in pdsolve/BC) invalid input: indets expects 1 or 2 arguments, but received 3.Please help me find my Error.Thank you!!!

Hello, Sir 

I tried to execute the program for a set values for more than one parameter but it is not existing, please can you do a favor for me in this case, that is how to write a program to execute set of values for more than one parameter at a time and how to plot the graph?


HI and other watchers,

Please enjoy the attaced files about combinatorics.
You may already know what '4 choose 3' is.


Hopefully this can be useful to the casual mathematical observer.




I am trying to plot f=[r^2 *cos(theta)+r*sin(theta)],as a DensityPlot[] in polar coordinates.

here r is a function of theta, r=r1(θ)..r2(θ) , for this reason, I have a problem to plot f in density plot

f=[r^2 *cos(theta)+r*sin(theta)];

r1(theta)= 0.3+0.1*cos(theta);
r2(theta)= 0.5+0.1*cos(theta);
display(changecoords(densityplot(f, r =r1(theta)..r2(theta), theta = 0 .. 2*Pi, style = patchnogrid, colorstyle = HUE), polar), axes = box, orientation = [270, 0], labels = [x, y, ``]);

(Error, (in plots/densityplot) bad range arguments r = .3+.1*cos(theta) .. .5+.1*cos(theta), theta = 0 .. 2*Pi )

Dear sir in this problem should accept five boundaryconditions but it is not working for five boundary conditions and showing the following error please can you tell why it is like this ??

Error, (in dsolve/numeric/bvp/convertsys) too many boundary conditions: expected 4, got 5
Error, (in plots:-display) expecting plot structures but received: [fplt[1], fplt[2], fplt[3], fplt[4], fplt[5], fplt[6], fplt[7]]
Error, (in plots:-display) expecting plot structures but received: [tplt[1], tplt[2], tplt[3], tplt[4], tplt[5], tplt[6], tplt[7]]

and for the progam please check the following link

Hi MaplePrimes,

This YouTube video has a nice puzzle. 

It is titled "Can you solve the locker riddle". 
My first blush was to consider modular arithmatic

Here is a maple page -


Have a very fine rest of the day.



1 2 3 4 5 6 7 Last Page 1 of 42