Hello everyone,

I have a system of PDEs

restart:with(PDEtools):with(plots,implicitplot):

Pr:=1:A:=1:lambda:=1:Omega:=1:epsilon:=1:C1:=1:N:=5:b:=1:fw:=1:a:=1:

Eq1:=diff(f(eta,tau),eta,eta,eta)-diff(theta(eta,tau),eta)*diff(f(eta,tau),eta,eta)+

f(eta,tau)*diff(f(eta,tau),eta,eta)-(diff(f(eta,tau),eta))^2-(1+A*(1-theta(eta,tau)))*diff(f(eta,tau),eta)

+lambda*(1+epsilon*cos(Pi*tau))*theta(eta,tau)-Omega*diff(diff(f(eta,tau),tau),eta);

Good morning sir,

I request you to provide the correct Maple proc to generate the Gershgorin circles for a given

Square Matrix

Good morning sir,

I request your support for the above cited subject.

Once a plot is generated using Maple commands for a certain problem, to lable the axes

I am facing the problem to lable at the desired positions on the graph.

I have some difficulties in my little example:

K:=(I_tr*sin(a+b)²-I_trsin(a-b)²)/(I_tr*sin(a+b)²+I_trsin(a-b)²)+2*I_ex

... after few transformations ...

K:=sin(2a)sin(2b)/(sin(a)²cos(b)²+cos(a)²sin(b)²+I_ex/I_tr)

also we have:

r:=I_ex/I_tr

d:=1+2*r

Hello everyone, i would like to make a graph to show the where the 2 funtions meet. I have already made the calculation but i also wanna show it in a graph, please help. 

y=2x-3

y=-0,5+7

My question is in the title, here is simple example: 

K:=(sin^2(a+b)-sin^2(a-b))

I use formula of abridged multiplication (with help of "factor")

>factor(K)

  (sin(a+b) - sin(a-b))(sin(a+b) + sin(a-b))

Then expand:

>expand(%, trig)

  4sin(a)cos(b)cos(a)sin(b)

And all I whant now is to use double angle formula like this:

4sin(a)cos(b)cos(a)sin(b) = sin(2a)sin(2b)

Hello,

It's a very easy question but i don't find for the moment.

I want to measure an angle in a revolute joint. For that purpose, i use a probe to measure the angle. The angle is measured in rad. How can i do to change in deg ?

Thank you for your help.

Hi, I need some help with my code. I got the code that you can see below:

> with(DEtools);

> with(plots);

> cc := Array(["Blue", "Red", "DarkGoldenrod", "Black", "LimeGreen", "DarkMagenta", "Indigo"]);

> ll := Array(...

Hello 

 I couldn't make plot3d in my Maple code please see the file I attached it and let me know any idea how can I make plot it in 3D

Thanks

Good morning sir,

I request you to provide the Maple Proc to solve the equations by Muller's method because it requires three 

initial approximations and the iteration process is very much tedious to get the desired accurate approximation.

Hello everyone,

I am dealing with an Eigen value problem, the equations are

restart:with(plots):

Eq1:=diff(f(y),y$2)-a^2*f(y)+a*(h(y)+R*q(y))=0;

Eq2:=diff(h(y),y$2)-a^2*h(y)+a*Z*y*f(y)=0;

Eq3:=diff(q(y),y$2)-a^2*q(y)+a*f(y)=0;

ic:=f(0)=0,f(1)=0,D(h)(0)=0,q(0)=0,h(1)=0,q(1)=0;

where f,h,q are Eigen functions, R, Z are dimensionless...

I am having trouble getting Maple to work with fractional exponents.  When I ask Maple to compute 8^(2/3) and 8^(1/3), it just echoes my input, instead of returning 4 and 2, respectively, as it should (I think the overwhelming majority of mathematicians would agree that Maple should return 4 and 2.  It is conventional not to consider complex numbers when defining, e.g.,  "8^(1/3)" unless a problem specifies that you need to consider complex numbers).  When I ask for 4^(1/2...

Hello,

It's a very easy question but i don't find for the moment.

I want to measure an angle in a revolute joint. For that purpose, i use a probe to measure the angle. The angle is measured in rad. How can i do to change in deg ?

Thank you for your help.

 how to find 6x^2 +5x+1 mod 2x+1 ? please using maple slove 

Hi all,

I'm getting started with maple. Want to solve the following integral:

int(     (  1+(a*x)^t  )^(-1/t)      , x = 0 .. z)

Constraint: 0<t<1

Maple 8 installed on an old WinXP gave me a solution with

hypergeometric functions. Maple 17 installed on a Linux64

gave me no answer at all. What could explain this difference?

Thx...