Hi all,

i want to solve a system of differential equations in maple with "dsolve, numeric",

i got th error message: "Error, (in f) unable to store in Matrix ..."

what is the problem?

thanks a lot

What is the command to get a sequence of the first twenty prime numbers

why system inconsistent 

when only want to obtain a equation H

in terms of a1 , a3, b2, b3, c1, c2, x1, x2, lambda

pdsolve([
Diff(H(x1,x2,lambda), x1) = a1*x1 + a3*lambda,
Diff(H(x1,x2,lambda), x2) = b2*x2 + b3*lambda,
Diff(H(x1,x2,lambda), lambda) = c1*x1 + c2*x2
], H(x1,x2,lambda));

Hi all. I am using Maple 18.

1. Does Maple only output an answer, or can it be made to display the steps it took to achieve the result, in a way that is logical and understandable by the user? For example, I would like to see it display steps when integrating or differentiating, or dividing a polynomial by another polynomial. Basically any process that involve simplifyinf or factorisation.

2. I am trying to divide x^2 + 5x + 9 by x+2, but all Maple displays is the expression

How can I make it do the polynomial division and output the steps it took? I tried using simplify and evaluate from the context menu but the output is still just the expression.

3. Has something happened to this site? It was working fine in Opera until two days ago, and has sinmce started displaying "Error generating page" where the replies to questions should be. No problems with the "posts" section, only in the "questions" section.

Thanks in advance.

Is there a document with all elementairy plottools commands to find?

i must construct a numberline and lines to e4xplain with a arrow and text under it.

with(Finance):
with(Statistics):
X:=RandomVariable(Binomial(nn, pp));
Drift(X);

How to listplot two vectors on the same graph?

That means having two lines.

f1 := -2*x1 - x2;
f2 := -x1 - 4*x2;
g1 := 2*x1 + 3*x2 - 6;
g2 := -x1;
g3 := -x2;
penalty := lambda1*Max(f1-M,0)+lambda2*Max(f2-M,0)+(M^2)*(max(g1,0) + max(g2,0) + max(g3,0));
M := 1;
k := 1;
s := 1;
lambda1 := 0.5;
lambda2 := 0.5;
with(Optimization):
Minimize(subs(lambda2=0.5, subs(lambda1=0.5, subs(M=1, penalty))));

correct answer for these parameters should be below, however, Minimize got error

when lambda1 = 0.5, lambda2 = 0.5
(x1, x2) = 1.551123, 0.965918
f(x1, x2) = (–4.068164, –5.414795);

in maple 12 or 15

assume 

result := Vector(10);

for i from 1 to 10 do

        result[i] := i;

od;

how to plot it against i?

after tried plot(result(x), x=1..10);

Hi all. I am using Maple 18.

1. How can I make maple NOT plot discontinuties with a vertical line? For example, plotting y=tan(x) displays vertical lines. Is there a setting to turn this off permanently?

2. When I type y=sin(x-Pi/2) and press enter, y = -cos(x) is displayed in blue. I am sure they are both the same thing, but I would like to see the expression that I typed, not an alternate expression that Maple wants to display.

3. Why do some expressions require a ; at the end, whilst others don't? Ie. y = sin(x) and y = 1+sin(x) do not, but y=2*sin(x) results in a "Warning, inserted missing semicolon at end of statement"

4. Is there a section on Mapleprimes(this site) where new users can ask questions? I would like to browse it to see what sort of problems other new Maples users have encountered. I am sure that my above questions may have been asked a few times over the years by newbies like myself.

Thanks in advance. :)

hi maple-friends !

for my work i have to solve a system of differential equations numerically - no problem with maple :-)

my problem: how can i get the resulting data of the numeric solutions in a file ?

(for example to use them with gnuplot)

what i have to do exactly ? i know just about writedata and readdata commands...

can anyone send me an example with a few comments ?

greetings,  kreso

With this contribution we opened a breach in the proper use of the program applied Thermodynamics.

Introducción_a_la_Termodinámica.mw     (in spanish)

How can I know the solution is correct??

Here is the code:

s := solve(sin(x^2) = 1/2);
test := subs(x = s[1], sin(x^2) = 1/2);

I am trying to produce a worksheet that will give me the two roots of a quadratic equation.

This is what I have:

As you can see, It's not giving me the right answers. What do I do?

Thanks,

Paul

I see a document with maple graphics in it, but i don't see the maple code in the document.

Has the author protected his code ?
I like to see the maple code used for the document ..how to read this maple code?

Note: try to find answer on the Maple site , but no idea where to find thisinformation on how to set up a document..frustrating.