Dear guys

To solve a typical integral I have written

int((t^(f-3/2))*(1-t^(2*(f-1)))^(-1/4),t);

but the solution is very complicated and contains "hypergeom". How can I have a simpler solution? I mean an explicit solution.

Thanks.  

Dear All,

I am trying to find (complex) eigenvalues and eigenvectors of a matrix as a function of a variable. Using the following commands lead to the respective errors:

- LinearAlgebra[Eigenvalues](A): Error, (in content/polynom) general case of floats not handled

- LinearAlgebra[Eigenvectors](A): Error, (in LA_Main:-Eigenvectors) cannot determine if this expression is true or false: 0.2480392156e-4*abs...

Can anyone explain these results?  I m trying to check on a more complicated form of this expression, but cannot proceed without understanding what is occurring in this case.

Does anyone know if you can schedual a task in maple ie at 12:00 add a number
to a matrix in a worksheet (Just an simple example to see if it is working)

In windows you can use the "Task Scheduler" to automate stuff that you need to repeat.

Also I dont want the actuall Maple software to actually launch at 12:00, I want everything to happend
in the background.

If you put the maple commands in the "start up code region" of the worksheet I guess it

I wrote my own maple library. Some of its procedures require the LinearAlgebra-library.

Is there a way to automatically load LinearAlgebra when loading my library? (I tried to use 'use' but it didnt help )
Currently i load my library with

read "/home/..../something.lib";

Is there any good refernce to learn how to write maple libraries the right way? the maple help isnt actually very helpful.

restart;with(geom3d):

point(M,1,2,1):

plane(P,x+y-3=0,[x,y,z]):

plane(Q,2*x-2*y+z-1=0,[x,y,z]):

line(d,[1+2*t,1-t,t],t):

n:=NormalVector(P):

line(Delta,[M,n],t):

Eq:=Equation(Delta):

intersection(N,d,P):

coordinates(N):

decom:=proc(n::posint,m::posint)
> local a,c,d::posint,e,f,i,j,k,l,s,t,u;s:=[];t:={};u:={};
> if m=n then return [[1$m]];fi;
>  for i from 1 to nops(decom(n-1,m)) do
>   a[i]:=op(i,decom(n-1,m));# a is a list
>   c[i]:=[op({op(a[i])})];
>   #d[i,j]:=coun(a[i],op(j,c[i]));#c:unrepeated numbers in a. d:number of repeatance
>    for k from 1 to nops(c[i]) do
>     e[i,k]:=aadd1(c[i],k);

decom:=proc(n::posint,m::posint)
> local a,c,d::posint,e,f,i,j,k,l,s,t,u;s:=[];t:={};u:={};
> if m=n then return [[1$m]];fi;
>  for i from 1 to nops(decom(n-1,m)) do
>   a[i]:=op(i,decom(n-1,m));# a is a list
>   c[i]:=[op({op(a[i])})];
>   #d[i,j]:=coun(a[i],op(j,c[i]));#c:unrepeated numbers in a. d:number of repeatance
>    for k from 1 to nops(c[i]) do
>     e[i,k]:=aadd1(c[i],k);

For example, in the list [1,1,1,1,2,4,6,1,9], how many 1s are there?

Is there a procedure in Maple? Or how can I manage to do it?

See the attached worksheet: myDet.mw

Why does the determinant of A  contain  x, x^3, x^5, x^7 and x^9 ?

Maple15/Linux/Fedora16_x86_64

i am solving for a system of df eq's, but the eq's have these little tricky integrals inside them.....so it either retards operation or no solutoin can be found...They look like...

B_12:=(10*a_2*a_3)*(u/( ((10^2+u)^(3/2)) * ((a_2^2+u)^(3/2)) * ((a_3^2+u)) )):

B_122:=(10*a_2*a_3)*(u/( ((10^2+u)^(3/2)) * ((a_2^2+u)^(5/2)) * ((a_3^2+u)) )):

B_123:=(10*a_2*a_3)*(u/( ((10^2+u)^(3/2)) * ((a_2^2+u)^(3/2)) * ((a_3^2+u)^(3/2)) )):

B_23:=(10*a_2*a_3...

My problem looks as follows................pts1FIXED comes from dsolved solution......it plots a empty figure...and i checked that l(the data pairs looks fine)..

--------------------------------------

Energy:=array(1..450);

Time:=array(1..450);

for i from 1 to 450 do 

	

	Energy[i]:=-1*((32*G*Inertia^2*e^2)/(5*c^2))*pts1FIXED(i);

end do:

l := [[t,Energy[t]] $t=1..450]:

plot(l,style=point,symbol=circle,color=blue);

I need some help...i need a solver using the Runge-Kutta method adaptive size control, to solve a sytem of 5 diff eq's, all of them are interlinked...

And 

Say that dsolve numeric produces a results, called Solution, Now ex  solution(0)=1, and in general solution(t) can be evaluated, now, i want to use this, in E(t)=2*solution(t), in a plot, thus...

plot(E(t),t=0..100,....), but returns the error....

Ok, I am not a very experienced user, but I am mystified by this.  The essence of the problem is that when entering a range of values in an integration, I get a different answer if the range is given as 0..1 to if it is given as 0.0..1 or 0..1.0. Here is the program

### dgig
dgig := proc(psi, chi, lambda, t)
    (psi/chi)^(lambda/2)*t^(lambda - 1)*exp(-(psi*t+chi/t)/2)/\
    (2*BesselK(lambda,sqrt(chi*psi))):
end: ## End of dgig

Suppose I have a file of text that I would like to read into a Maple (16) worksheet as a string. (I have in mind encrypting the string using the RSA encryption scheme.)

If I paste the text directly into the worksheet and surround it by ",  I have no problem, but if I try to read, for example, a file some_text.txt using a command like

     read("C:\\Users\\MyName\\Desktop\\some_text.txt");