MaplePrimes - Maple 15 Posts and Questions

Linux/Unix version

casperyc — Fri, 17 May 2013 23:40:58 Z

Hi,

I am using Maple 15 on a school server. In most of the times, the following screen occurs:

Can I get rid of that notice? My results got disappear very quickly to the TOP.

Is that something I can change or it has to be done from the admin?

And just a general question, do Maple run more or less faster on Linux/Unix machine than windows?

Laurent series of exp(1/z) at z=1

zippon — Wed, 15 May 2013 09:12:07 Z

As showed in attached file

the laurent series of exp(1/z) at z=1 is equal to the taylor series of exp(z) at z=1

Intermittent font issue

Mac Dude — Tue, 14 May 2013 03:29:19 Z

I have an intermittent font issue in Maple 15 on Mac OS X 10.4 and 10.5.

Every-so-often it happens that certain characters do not show in the Maple output. These are usually greek characters or somewhat more exotic mathematical symbols. I do shuffle file back & forth between my systems which are Maple 15 and OS X 10.4.11 and 10.5.8. Java id 1.5 on both of these. Occasionally, a file may also get to a machine running Maple 17 on 10.6.8 with Java 1.6, but that is...

fsolve question

E Monkey — Fri, 10 May 2013 01:27:32 Z

I am trying to find the zeros of the sine function below when i do maple just returnes 0.

simple program in MAPLE

AliKhan — Wed, 08 May 2013 10:45:12 Z

Dear All,

Please can someone help me in writing the Maple program for the following, I am stuck :

theta(n):=((beta*a)/(Pi))*(A1(n)+A2(n)

with

A1(n)=(sin((n+1)*beta/2))/((n+1)*beta/2)

A2(n)=1 for n=1

A1(n)=(sin((n+1)*beta/2))/((n+1)*beta/2)

A2(n) = (sin((n-1)*beta/2))/((n-1)*(beta/2)) for n is not equal to 1

note pls: n= 1, 3, 5,....

Thanks in advance

When does OpenMaple call queryInterrupt?

TI_ET_User — Tue, 07 May 2013 20:54:00 Z

(This question applies to the Win32 version of Maple 15.)

I've got a python wrapper for the OpenMaple interface, and I've managed to get most of the callback functions in the MCallBackVector structure passed in to StartMaple to work, but I've never (ever) seen the queryInterrupt callback called.

To investigate this, I modified the 'omexample.c' example (found in the <Maple install Dir>\samples\OpenMaple\cmaple directory installed with the product...

How to construct such a matrix

zippon — Thu, 02 May 2013 03:18:58 Z

Given an n*n matrix M an its rth row and cth column element m[r,c].Suppose m[r,c] = c*m[r-1,c]+a*m[r-1,c-1] and m[0,0]=1, m[0,k]=m[l,0]=0 for k>0,l>0.The letter "a" denotes a constant number and n can be any non negtive integer.

a question about osculating circle

plasticman — Wed, 01 May 2013 21:33:53 Z

In 2D, graph a blue ellipse x(t)=3cos(t), y(t)=2sin(t) for 0≤t≤2∏. For t=0.5 graph a green tangent line to the ellipse and a red osculating circle. Also, give the curvature, the equation of the tangent line and the center of the osculating circle

Solve the system of linear equations

geri23 — Wed, 01 May 2013 14:02:42 Z

Hi,

I have this system of lienar equations:

a question about bezier curve

plasticman — Wed, 01 May 2013 06:19:31 Z

graph a red bezier curve start at the point P1(0, 0, 1) in the direction of <-2, 0, 1> and ends at P3=(0, 2, 0) from the direction of <0, 1, 0>. Use "axes=normal" and rotate the image for a good view of the curve. Also, write the coordinates of the other two control points that you used.

How to calculate this module with Maple

williamov — Wed, 01 May 2013 04:04:04 Z

http://math.stackexchange.com/questions/376240/how-to-calculate-grobner-basis-for-syzi-f1-f2-g1-g2

http://math.stackexchange.com/questions/376980/why-syz-algorithm-for-module-have-dimension-problem-how-to-divide-vector-and-mu

Create algebraic function using a numeric dsolve solution

XelN4g4 — Sat, 27 Apr 2013 09:51:23 Z

Hello,

for my mechanical engineering studies we have to optimize an engine during a workshop. Therefore we have to use a numerical dsolve to solve the equation of motion. I have to get the maximum bearing reaction for a constant rpm. In order to get this I can't think of anything else but use the dsolve solution and use it in maximize.

ysk_2 := t -> -rc*cos(phi(t))-lp*cos(alpha(t))-lkb-y(t);
ysp_2 := t -> -rc*cos(phi(t))-lp2*cos(alpha(t))-y(t);

use ... in ... end use

Mac Dude — Fri, 26 Apr 2013 15:20:50 Z

I have a Mma code from a colleague that I am trying to port to Maple. This code uses a lot of Mma With[{...}, ...] constructs, to which I found the Maple "use ... in ... end use" construct the closest equivalent. What is being done is to initialize a bunch of local variables and then run the calculations. Non-initialized variables (the ones not in the first section) remain global.

I ran into a problem in Maple when I tried to initialize an element of a Vector, like "use a[1...

how do i solve the following PDE in maple?

mutaz — Fri, 26 Apr 2013 11:47:32 Z

i'm using maple 15 and trying to solve the following PDE without success, can you help please.

(ab+(a*sin(x1))^2-(c*cos(x1))^2)*d/dx1(V(x1,x2))=-dsin(x1)/exp(x1).

where a,b,c and d are constants. and i need it to be solved as a PDE please.

thank you,

Mutaz

how to partial derivative w.r.t. xdot

abqorian — Wed, 24 Apr 2013 08:40:21 Z

Hi,

My work requires me to use derivative a lot. Especially, the partial one. Given F(x,x_dot). Maple has this partial expression, however I'd like to partial differentiate F with regard to x_dot (the derivative of x over time).

Is this possible? If possible, please tell me how.

Thank you.

Abe