I think I have found a subtle bug in my Maple 9.

If I execute the following code:

###
 B:=[ 3.5, 0.0001, 73.45]; A:=[[seq(1/op(j,B), j=1..3)]];
 writedata("a.txt",A);
###

the output file a.txt contains the line
0.2857142857    1       0.01361470388
(beware: maple has written "1" instead than "10000"!)

Questions:
1) is this bug already known? Is there a patch?
2) does it affect newer versions of Maple?

HI,

I want to make a program that will list the twin primes.  Is it possible to implement the isprime function in C?  I want to be able to run this program on a computer that doesn't have Maple installed.  Here is my code -

twinprimes := proc (maxnum)
local a;
description "output the twin primes less than maxnum";
printf("%12d", 3);
for a from 6 by 6 to maxnum do
if `and`(isprime(a-1) = true, isprime(a+1) = true)
then printf("%12d", a-1) end if

How to change font for TextAreaComponent? Size of symbols by default are too small :(

How to change 'Data table' component column width? Is it somehow related to width of data table, to which this component connected?

Hi there
I have a working Maple 15 license server currently used for local network connections.
I have a working VPN server allowing restricted connections to our local domain from the outside.
I have configured the Firewall rules on the VPN server to allow such communication as being able to ping the Maple server as well as knowing that port 27000 is open through the VPN (tested using telnet).
Example, if I run a laptop on the internal side, then Maple runs fine.

Why Maple can't solve ? The reason would be enough, if nobody can solve.

sys_of_eqs.mw

Thanks.

{Float(10.00)} union {Float(10.0)}is two element. I have only floats to be added to my set. What operation should i do before union to "unify" all of them or must i only do linear search?

Hello,
I tried to write a procedure for the first time and it worked good. But I still have problems:

1. the coordinates of the point "p"
Is it possible to mix text with variables like: "The balance point is: xs:",xs,"/ys:",ys
                        or "The balance point is [xs,ys]=",p

2. use of "y" after procedure has processed
I declared the variables of the...

I asked a question few hours ago. I corrected the error in the process I was suggested. How in writing the program to collect the coefficients of m^0, m^1 and m^2, I am again stuck in an error and could not find any help.

restart; N := 2

Eq[1] := diff(f(eta), `$`(eta, 3))+(m+4)*f(eta)*(diff(f(eta), `$`(eta, 2)))-(2*(m+1))*(diff(f(eta), eta))^2-(2*(m+1))*h(eta)-(.5*(m-2))*eta*(diff(h(eta), eta))

Eq[2] := g(eta)-(diff(h(eta), eta))

Eq[3] := (diff(g(eta...

Hello everyone

I'm a new maple user, so I'm really sorry if this question is dumb, I've tried to find people with a similar problem but didn't find anyone.

So this is my problem: when I try to multiply a vector with a variable it gives me this:

> Restart; With(LinearAlgebra);
> B1 := [1, 2, 0, -1];
                         [1, 2, 0, -1]
> B2 := [0, 1, -1, 0];
                         [0, 1, -1, 0]
> A1 := a*B1+b*B2;

Hello everbody! Please, I need your help again.

B(ν)=2hν³/(c² *(exp(hν/kT)-1);

h=6.63*10^-34;

c=3*10⁸;

k=1.38*10^-23;

ν=0,001..10 if T=3000;

ν=10..10000 if T=3000;

plot(B(ν),ν);

Thanks

How can I get this expression, ln(1+y²/(x-1)²)+2ln(x-1) , to simplify to ln((x-1)²+y²) ?  I would think Maple should be able to do that.  Thanks, Ratch

I have a system of three non-linear coupled ODEs. I am trying to obtain the zeroth order, first order and second order equations and their boundary conditions using the perturbation technique. I then need to solve them. I wrote the following MAPLE lines for the purpose.

restart; N := 2

Eq[1] := diff(f(eta), `$`(eta, 3))+(m+4)*f(eta)*(diff(f(eta), `$`(eta, 2)))-(2*(m+1))*(diff(f(eta), eta))^2-(2*(m+1))*h(eta)-(.5*(m-2))*eta*(diff(h(eta), eta))

Eq[2] := g(eta)-(diff(h(eta), eta))

I would like to perform some operations on all the entries of an array (or an all entries in some given rows/columns).
Can this be achieved without writing an ad hoc loop?
(for instance this task is extremely easy in octave/matlab)
Should I use some specific package?