I use combinat[randperm] in MapleTA to get random permutations. But everytime I call the corresponding question bank, I get the same sequence of permutations. Even a randomize();with(combinat);randperm... doesn't change this behaviour but every single student should get different homeworks. Any idea?

In economics, variables are always real and often positive.

With assume(x>=0) I can set this for individual variables. But with many variables it is arduous.

Is it possible to set by default all variables to >=0 and define ony the exceptions individually?

Thanks you !

With Maple I get the following result

For easier interpretation I would prefer the following, equivalent form:

I tryed a lot,...

Hi!

I have to maple worksheets: one called test.mw and another called wholecode.mw. I read a file with

read(filename); from both .mw sheets.

but then test.mw file gives me a correct result while wholecode.mw does not execute the linalg commands. For example, in filename there is:

for i from 1 to 8 do

    s:=col(A,i);
    A1[i] := dotprod([1, x1, x2, x3], s);

od;

while test.mw gives the result wholecode.mw just gives

INPUT:
  [1,2] + [3,4]*x
DESIRED OUTPUT:
  [1+3*x, 2+4*x] as a list

Right now I do the following:
  >  combined := evalm([1,2] + [3,4]*x);

combined := [1 + 3*x, 2 + 4*x]

 
  >  combined := convert(combined, 'list');

combined := [1 + 3*x, 2 + 4*x]

The reason I need to use...

Hello, I have a set of equations, and I want to solve it over the integers (mod 13). But msolve command fails. Here is my code:

eq:={a4*a1-11, a4*a2-12, a4*a3-6, a5*a1-3, a5*a2-8, a5*a3-4, a6*a1-2, a6*a2-1, a6*a3-7};
msolve(eq,13);

It fails, but I can solve it manually. Here is a solution:

a4*a1 = 11 => a4:=1 and a1:=11

a4*a2 = 12 => a2:=12

a4*a3 = 6 => a3:=6

a5*a1 = 3 => a5:=3/11 mod 13 = 5

a5*a2 = 8 => a2:=8/5 mod 13 = 12

Hi there,

 I have a piece of code that uses lists instead of vectors and recently, it crashed, it ran out of memory. Long story short, if I use vectors instead of lists, the performance is much better and optimal (this I knew but I was lazy to translate all my code). However, there's one single line that I cannot efficiently translate and it's the one that uses the function member(). Before, I had the following (it's an oversimplification of my code in order to easily discuss it in here):

In the name of God

Hello all,

Look at these instructions, entered in maple16(x64):

temp:=Matrix(25000):

--- Up to now, about 5 Gb's of my 8Gb memory is occupied and no problem

unassign('temp');

gc()

temp:=Matrix(25000):

Error, (in Matrix) Maple was unable to allocate enough memory to complete this computation. Please see

hello i am using maple and i really like it but one part about it that i do not like is the following:

• the program forces me to use the mouse. it makes me point and click as if I'm a little child and I find this very degrading. Please help.

For example, how do I perform "insert maple input after the current execution group" with the keyboard? And how do I find/configure other keyboard shortcuts? Thanks in advance.

Hi,

Recently, I upgraded from Maple 13 to Maple 16.  I have been using Maple for 20 years --- Maple V Release 2 (1992) through Maple 16 (2012), and I participated in beta testing Maple V Release 4, which developed what we now call the Classic Interface.  The Classic Interface is amazing --- it was better than Mathematica in 1994 and it is still better than Maple's Standard Interface.  The Standard Interface is missing features that were...

1. a)given ∫(0..4)∫(√x..2) of sin(pi)*y^3 dydx, graph the region, R, in the xy plane.

b)Write double integral which reverses the order of integration and then evaluate.

2. Find centroid of cardioid of region enclosed by cardioid r=1-sin(theta)

3. a)Graph wedge cut from cylinder x^2+y^2=9, and by planes, z=-y, and z=0, and above the xy plane.

b)Write the integral which finds the volume of the wedge and evaluate it.

Will an older version of AEM (e.g., AEM 14) run with a newer version of Maple (e.g., Maple 16)?

Hi all,

Is there a quicker way to find all unknows from an expression?

unknowns.mw

Say I want a list contains ALL parameters. In this case, it would return

[w1,w2,mu,tau[2],tan[3],tan[4],eta[1],eta[2]]

Is there a way to do this?

Thanks!

Casper

As an intermeditae result I get from maple

It is obvious, that two fractions can be reduced by (1-t).

I could not reach this with simplify, solve, factor, expand, ...

Any idea?

In addition in the numerator (1-t)^2 is possible. How do I get this?

Thanks for any help !

Hello,

I have the following object:

t = ∫ (from 0 to e_0) [1 + (121/304)e²)]^1181/2299 (1 - e²)^-3/2 e^29/19 de

and I would like to plot t vs. e_0 on the interval 0 <= e_0 <= about 0.9.

So far, I have managed to get Maple to integrate the thing for any value I like of e_0 from 0 up to (but not including) 1. So, I now just need to get Maple...