Maple Questions and Posts

These are Posts and Questions associated with the product, Maple

why i can not evaluate 29 polynomial. maple try to evaluate last 7hr, how many time required too solve it?

 

How to change the numbers shown in the diagram shapes from y=0.5- to rigth form y=-0.5a.mw

Download a.mw


 

 

 

 

 

 

Hello,

Please , how can we plot two figures with different X-axis and the same Y-axis ?

Thank you

 

general_solution.mwI want to calculate the diff equations numerical solutions at z=500 with calling the integrals with limits -500..Z and i want the datefile of resualts

 

Dear authors,
How to solve this ode problem.

Download link ode.mw

In this problem the boundary condition is

Note: F=g in our problem.

eta approaches N.

Thank you.

 

Hello, I need to figure out what theta is through this matrix:

https://imgur.com/RldbcJD

Should I use a solve command for this?

Executing the entire worksheet several times I obtain random results for Threads:-Seq

restart;

N:=10^3;
f:= (a,b) -> add(evalf(j), j=a..b);

1000

 

proc (a, b) options operator, arrow; add(evalf(j), j = a .. b) end proc

(1)

seq(f(k*N/4+1,(k+1)*N/4), k=0..3);

31375., 93875., 156375., 218875.

(2)

Threads:-Seq(f(k*N/4+1,(k+1)*N/4), k=0..3);

31218.+j, 93875., 156375., 218875.

(3)

Threads:-Seq(f(k*N/4+1,(k+1)*N/4), k=0..3);

31375., 93875., 156375., 218875.

(4)

Threads:-Seq(f(k*N/4+1,(k+1)*N/4), k=0..3);

31900., 94170., 156375., 218875.

(5)

 


Download threads!.mw

I have to use the Chinese Remainder Theorem but once I have found m^e I cant seem to figure out a way that works to get just the message without the exponent. I assumed that the exponent is 3 since the message was encrypted 3 different times. How can I do this with Maple?

CRA_project.mw

is possible to solve this pde via maple?

m1.mwm1.mw
 

restart

sys := [-(-r^2+1)*(diff(theta(r, z), z))+(diff(theta(r, z), r)+r*(diff(theta(r, z), r, r)))/r+diff(theta(r, z), z, z)+(diff(theta(r, z), r))*(diff(sigma(r, z), r))+(diff(sigma(r, z), z))*(diff(theta(r, z), z))+(diff(theta(r, z), r))^2+(diff(theta(r, z), z))^2 = 0, -(-r^2+1)*(diff(sigma(r, z), z))+(diff(sigma(r, z), r)+r*(diff(sigma(r, z), r, r)))/r+diff(sigma(r, z), z, z)+(diff(theta(r, z), r)+r*(diff(theta(r, z), r, r)))/r+diff(theta(r, z), z, z) = 0]; IBCs := {sigma(1, z) = 1, sigma(r, 0) = 1, theta(1, z) = 1, theta(r, 0) = 1, (D[1](sigma))(0, z) = 0, (D[1](theta))(0, z) = 0, (D[2](sigma))(r, 1) = 0, (D[2](theta))(r, 1) = 0}

[-(-r^2+1)*(diff(theta(r, z), z))+(diff(theta(r, z), r)+r*(diff(diff(theta(r, z), r), r)))/r+diff(diff(theta(r, z), z), z)+(diff(theta(r, z), r))*(diff(sigma(r, z), r))+(diff(sigma(r, z), z))*(diff(theta(r, z), z))+(diff(theta(r, z), r))^2+(diff(theta(r, z), z))^2 = 0, -(-r^2+1)*(diff(sigma(r, z), z))+(diff(sigma(r, z), r)+r*(diff(diff(sigma(r, z), r), r)))/r+diff(diff(sigma(r, z), z), z)+(diff(theta(r, z), r)+r*(diff(diff(theta(r, z), r), r)))/r+diff(diff(theta(r, z), z), z) = 0]

 

{sigma(1, z) = 1, sigma(r, 0) = 1, theta(1, z) = 1, theta(r, 0) = 1, (D[1](sigma))(0, z) = 0, (D[1](theta))(0, z) = 0, (D[2](sigma))(r, 1) = 0, (D[2](theta))(r, 1) = 0}

(1)

NULL


 

Download m1.mw

 

convert(...,Int) in Maple 2018.2 works for fourier, invfourier, laplace, but does not work for invlaplace.  

Why is that? Is there a workaround?

expr:=fourier(f(x), x, w):
convert(expr,Int);

expr:=invfourier(f(w), w, x):
convert(expr,Int);

expr:=laplace(f(s),s,t):
convert(expr,Int)

expr:=invlaplace(f(s),s,t):
convert(expr,Int)

Was expecting to see the Mellin's inverse formula.

Maple 2018.2 on windows 10

 

 write a programe for fractional calculus and it shows subscript error plzz help me with that

hai, 
greetings,

I require help to plot graphs by changing differernt parameters. i am enclosing my codes and sample codes,

 my_codes.mw

nanofluid_sample.mw

Thanks in advance.

Ok so when a module is loaded, there is a .dll file that loads a list of symbols into maple.exe, what can be done if an error occurs for which the debugging output declares that the PDB file for the module could not be found? 

I have read that the program database file stores debugging information related to the locating symbols, how can i fix this if my computer isn't finding theres files for a list of .dll it attempts to load into maple.exe, or is there a way for which i can make these files for each corresponding module?

how I can pdsolve these equations?

moadelat.mw


 

NULL

restart

f1 := -3*(diff(theta(r, z), z))+(diff(r*(diff(theta(r, z), r)), r))/r+diff(theta(r, z), z, z)+2*((diff(theta(r, z), r))*(diff(sigma(r, z), r))+(diff(sigma(r, z), z))*(diff(theta(r, z), z)))+4*((diff(theta(r, z), r))^2+(diff(theta(r, z), z))^2) = 0; f2 := -3*(diff(sigma(r, z), z))+2*((diff(r*(diff(sigma(r, z), r)), r))/r+diff(sigma(r, z), z, z))+(diff(r*(diff(theta(r, z), r)), r))/r+diff(theta(r, z), z, z) = 0

-3*(diff(theta(r, z), z))+(diff(theta(r, z), r)+r*(diff(diff(theta(r, z), r), r)))/r+diff(diff(theta(r, z), z), z)+2*(diff(theta(r, z), r))*(diff(sigma(r, z), r))+2*(diff(sigma(r, z), z))*(diff(theta(r, z), z))+4*(diff(theta(r, z), r))^2+4*(diff(theta(r, z), z))^2 = 0

 

-3*(diff(sigma(r, z), z))+2*(diff(sigma(r, z), r)+r*(diff(diff(sigma(r, z), r), r)))/r+2*(diff(diff(sigma(r, z), z), z))+(diff(theta(r, z), r)+r*(diff(diff(theta(r, z), r), r)))/r+diff(diff(theta(r, z), z), z) = 0

(1)

f3 := sigma(r, 0) = 1, theta(r, 0) = 1, (D[2](theta))(r, 1) = 0, (D[2](sigma))(r, 1) = 0, (D[1](theta))(0, z) = 0, (D[1](sigma))(0, z) = 0, sigma(1, z) = 1, theta(1, z) = 1

sigma(r, 0) = 1, theta(r, 0) = 1, (D[2](theta))(r, 1) = 0, (D[2](sigma))(r, 1) = 0, (D[1](theta))(0, z) = 0, (D[1](sigma))(0, z) = 0, sigma(1, z) = 1, theta(1, z) = 1

(2)

``


 

Download moadelat.mw

I'm using the differential operator D to differentiate variables and look at the structure of the equations, i.e. turn things like

D[1]u-vt+v^2=0 into

D[1,2](u)-D[2](v)*t+v*D[1](t)+2*v*D[2](v)=0

However, it is assumed that this is a commutative operator, i.e. D[1,2]=D[2,1]. Can I use an option to have it not commute, or should I look into using the DETools package?

Thanks,

Mike

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