Maple not working don't know what is wrond????

 

HELP!!!

 

http://www.mediafire.com/?nbzczfmyyro

I have a nasty expression that solves for eigenvalues of pressure & shear waves propagating along an interface between 2 elastic media.  There are many roots to this expression for eta, but many of them can be excluded because the material properties are both REAL & POSITIVE.  I am very new to MAPLE & I am attempting to get it to solve for the roots where all of the other parameters meet the conditions of REAL & POSITIVE but I am not sure I am doing this correctly because MAPLE runs off to evaluation mode & takes so much memory my computer slows to a crawl &

I put the following into Maple (12) A := 2*x*z+2*z*y+x*y V := x*y*z sys := {A= S, diff(V, x) = lambda*(diff(A, x)), diff(V, y) = lambda*(diff(A, y)), diff(V, z) = lambda*(diff(A, z))} S being a constant solve(sys, [x, y, z, lambda]); and got: [[x = RootOf(3*_Z^2-S, label = _L1), y = RootOf(3*_Z^2-S, label = _L1), z = (1/2)*RootOf(3*_Z^2-S, label = _L1), lambda = (1/4)*RootOf(3*_Z^2-S, label = _L1)]] which makes no sense to me... How can I enter this system into maple and get an answer? (the system is gradA=gradV and A=S, S being a constant, which is shown above) Thanks!

Hi,

 

> restart;
> read "D:/Data/Data7/Advisor/csum.m";
> a :=n ->  (5/n)^(1/n);
> csum(a(n), n);

                                    false

But

 

ok,

my first quations is: How can I get  V(F(x), G(x)) in the last expression in the below picture evaluated at the end point t and T. 

The solution should be a vertical line to the right-hand side of the expression

 

My second quation is: Is there any way I can sequentialy solve the problem without having to manually rewrite the equations

 

 

Is it possible to easily use a procedure that I create in one worksheet in other worksheets (i.e. make it into a loadable package) without having to cut and paste the whole procedure text into each worksheet that I want to use it in?  It is a bit of a pain to have to do manual version management of my particular procedure in each sheet when I use it in a number of different files.

Hi everybody,

I have to solve a symbolic equation.

Therefore I use the convenient solve command.

The problem is, that the result I get is not the one I need. It is a correct soultion though. The equation has two solutions.

So how can I get more results out of the solve command.

I found "_EnvAllSolutions:= true;"

Unfortunately this made only disappear the Warning: Warning, solutions may have been lost" without producing any more solutions.

Regards

Kalle

Hello I was wondering how to generate bitstrings of length n that do not contain two consecutives ones. So far i have the following bitstring := x[i]; for i to 5 do bitstring := [op(bitstring), rand(2)()]; if x[i] = 1 then x[i+1] = 0 else x[i+1] = rand(2)() end if end do; bitstring there are two problems with this: (1) this is not from 1 to n (and i don't know how to specify this) (2) It produces strings which do have consecutive ones. Thank you in advance any help, Herman

Hi folks, I have been trying to solve that problem for the last 2 days, but I dont get it:

 

Lets say I have a velecity vector which is dependent from t:

v:=t->Vector(3,{1=t^2,2=3t,3=t^3})

Hello humble forum readers

I haven't used Maple in over 10 years and am therefor a bit rusty when it comes to runtime optimizations; on top of that, I'm not a mathematician, so bear with my limited knowledge in this field. A risk analysis problem of a rather complex system resulted in roughly following integral, which I seem to be unable to compute with Maple (Version 12, in case this matters):

binom[1]:=(a1+b1*exp(-(a1+b1)*t))^k[1];

binom[2]:=(a2+b2*exp(-(a2+b2)*t))^k[2];

The curve y= (224755712/(x^2+369664) is called a Witch of Agneesi.  You wish to place a rectangle between the Witch of Agneesi and the x-axis, and you want your rectangle centered on the y-axis.  Assign to area the maximum area of such a rectangle.  Use exact arithmetic (i.e. do not use evalf).  Can someone please tell me how you would go about solving a problem like this?  I have no idea!

hello, now i confront a problem of a maple function---msolve.
I want to sovle the problem like this: i have a matrix with all entries only one or zero. and i have known the sum of unknows in each row and column. i want to get the entries in the matrix.
For example i have 3 by 3 matrix.
[x1 x2 x3
x4 x5 x6
x7 x8 x9]
i have known the sum of unknows in each row and column. for example,
x1+x2+x3=1; x4+x5+x6=1; x7+x8+x9=1; x1+x4+x7=1; x2+x5+x8=1; x3+x6+x9=1;
another constraint is x1 to x9 are only one or zero.

hello.

I have calculated an integral equation (general goursat problem) with an iteration method. I want to know how could I use MAPLE to derive a function for.

I found the first 4 iteration for function f.

the exact problem is U_xy=2.U.U_x .

U(x,y)=2x on y=x^2+x and U(x,y)=3x^2 on y=0.

I want to find the U function.

y=t^2+t

U₀=2t-3t^2+3x^2

U_n=U₀+int(2*U_n*(U_n)_x)

I am using Maple 11.

I try to plot implcitly with filled regions such function:

(5-|2*x+2*y-13|)

When I use the plot assistant, I can get on a preview my implicit plot which is a ring. But, when I click plot, I get an error. 

So, Maple show the right preview and cannot get plot.

What is wrong? 

HI all,

I know that :

alias(delta=Dirac):

`δ*g` = int(delta(x)*g(t-x), x = 0 .. t) and int(delta(x)*g(t-x), x = 0 .. t) = g(t);

 

But look what happen.  Can someone justify this behavior