Maple Questions and Posts

These are Posts and Questions associated with the product, Maple

Attractor.mw
Hello, anybody could help with this error?

restart

interface(imaginaryunit = j);

I

(1)

with(DEtools):

k := .5; 1; tau := .95; 1; mu := 0.1e-1; 1; pi := 116.1; 1; vartheta := 0.8e-2; 1; phi := 0.25e-2; 1; epsilon := 0.2e-2; 1; rho := 0.5e-1; 1; beta := 0.115e-1; 1; chi := 0.598e-2; 1; q := .5; 1; eta := .2; 1; delta := .1; 1; alpha := 0.57e-1; 1; p := .2; 1; Upsilon := 1.2

.5

 

.95

 

0.1e-1

 

116.1

 

0.8e-2

 

0.25e-2

 

0.2e-2

 

0.5e-1

 

0.115e-1

 

0.598e-2

 

.5

 

.2

 

.1

 

0.57e-1

 

.2

 

1.2

(2)

lambda := k*tau*(C(t)*Upsilon+I(t))/(S(t)+V(t)+C(t)+I(t)+R(t)):

DEplot3d({d*C(t)/dt = rho*lambda*S(t)+rho*`ε`*lambda*V(t)+(1-q)*eta*I(t)-(mu+beta+chi)*C(t), d*I(t)/dt = (1-rho)*lambda*S(t)+(1-rho)*`ε`*lambda*V(t)+chi*C(t)-(mu+alpha+eta)*I(t), d*R(t)/dt = beta*C(t)+q*eta*I(t)-(mu+delta)*R(t), d*S(t)/dt = (1-p)*pi+phi*V(t)+delta*R(t)-(mu+lambda+`ϑ`)*S(t), d*V(t)/dt = p*pi+`ϑ`*S(t)-(lambda*`ε`+mu+phi)*V(t)}, {C(t), I(t), R(t), S(t), V(t)}, t = 0 .. 300, stepsize = .1, [[S(0) = 8200, V(0) = 2800, C(0) = 200, I(0) = 210, R(0) = 200]], linecolour = t, axes = BOXED, scene = [S, V, C, I, R])

Error, (in DEtools/DEplot/CheckInitial) the 'number' option must be specified before initial conditions

 

``


 

Download Attractor.mw

 

How to convert maple file into the pdf file?For example the attacahed file is maple file.I want to convert this to a pdf file.

conservation_of_wave_eq.mw

If i was a good student i wouldnt be using the is function for these at all, but im quite tired now so i thought that it would be fine this time. But i honest cannot see what additional declarations need to be made here, and why a false is returned for the first query, then FAIL for the negation of the first in the second query, the only thing i can think of is declaring that indeed n and m are elements of N, but if maple was allowing for Gaussian n,m surely both queries would return fail, and so obvious it is indeed acknowledging the arguments are on R, anyway hopefully someone gets the chance to make me feel silly here

 


 

assume(n < m, n > 1)

is((3*n-1)/(n^3+2*n+1)-(3*m-1)/(m^3+2*m+1) < 0)

false

(1)

is((3*n-1)/(n^3+2*n+1)-(3*m-1)/(m^3+2*m+1) >= 0)

FAIL

(2)

``


 

Download MISSING_ASSUMPTION.mw

I'm stuck with applying boundary conditions for a cantilever beam please help with format

What is the best method of transferring figures of maple 18 to latex ?

Hi all,

I don't know why this file doesn't work anymore! It was ok last week. I even reinstall the Maple on my laptop, but it went wrong again...

 

Please help me.

 

Plot_Diff_Temperature.mw

Can Maple solve the chief or nurse shift problems? 

I have a positive function and I'm taking an integral from it. I don't get why Maple computes the integral over a bigger region but not over a subset of it! Here is the integral. Does anyone know what is going wrong?

int(15.91549431*abs(6.100147120*10^6/k[6]-2.027358424*10^6*(1.241833982*k[6]/T[1]+2.)/k[6]+2.002942410*10^6/T[1])*exp(-50.00000000*(1.241833982*k[6]/T[1]-1.5)^2)/(k[6]^2*T[1]^2), T[1] = -.5 .. 0, k[6] = -.5 .. 0, numeric)
int(15.91549431*abs(6.100147120*10^6/k[6]-2.027358424*10^6*(1.241833982*k[6]/T[1]+2.)/k[6]+2.002942410*10^6/T[1])*exp(-50.00000000*(1.241833982*k[6]/T[1]-1.5)^2)/(k[6]^2*T[1]^2), T[1] = -.9 .. 0, k[6] = -.9 .. 0, numeric)

Hi all

I have a special 2*2 block martix like follwing:

 

 

how can i define this by maple?

thanks in advance.

"There were problems during the loading process. Your worksheet may be incomplete."

 

Pls fix this problem for me. I tried various things. The text in the worksheet is in Danish and contains danish letters (æøå) which may have caused the problem.

Maple Worksheet - Error

Failed to load the worksheet /maplenet/convert/1._Opgaver.mw .
 

Download 1._Opgaver.mw

Download 1._Opgaver.mw

 

 

In a Maple worksheet i have created a module containing a few procedures. I wish to make the module accesible upon start-up as a package so that i can use my procedures in any maple document or worksheet with my package. How do i do this?

cutin.mws

Am trying to learn about commands in Maple 7 I have not come across before - namely cutin, cutout and project.  Am I correct in thinking these commands are for use in three dimensions, and won't work in two dimensions?  Examples in the Help section seem to be confined to 3D.

  In the attached program I created a triangle (triag)using the polygon feature, then used project(triag, [[0,0.5],[2,2]]) to see what the resultant plot would be.  It was a line segment with length of the triangle - as if it was the shadow of the triangle.  Am I right in thinking a 3D object would give a 2D shape using this project command?

Thanks, David 

I posted this earlier on a question I asked more than a month ago due to the similarity of the problem.  However, I got no response.  So I will post this as a new question in an effort to get a response.

I get the following error when working with the "INERT" Sum?

Warning, solutions may have been lost

I do not get the message when working with the "ACTIVE" sum.  I tried the AllSolutions option, but still get the same message.  How can I get the proper output working with the "INERT" form?

lost_solutions.mw

Hello Forum, 

I have a quick question i was hoping someone could help me with. 

Is there a way to put a line though "math" text like below

+8 = +8

to visualize that to values cancels each other out? 

I hope someone can help, i can´t find anything on google

Thanks in advance 
IllIN - 

hello my friends

I have a critical problem to solve below the system of differential equations

-(9/14)*R(t)^(19/14)-(285/196)*(diff(R(t), t, t))/R(t)^(9/14)+(2565/2744)*(diff(R(t), t))^2/R(t)^(23/14) = -k*(4*lambda+1/a(t)^3)

and R(t) = 6*((diff(a(t), t))^2/a(t)^2+(diff(a(t), `$`(t, 2)))/a(t))

I need to find form of a(t) numerically from set of differential equatios

plz help me as soon as possible

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