## Integral equations......

Asked by:

Hello,

I am trying to get Maple to help me solve an integral equation.  I tried the solve command, which I suspected wouldn't work.  I was right, but I do not know how else to approach the problem.  Here is what I did:

solve(int(f(t), t = 1 .. x) = 5*x^2+7*x-3, f(t))

Of course this produced an error.  Any suggestions?  Thank you.

## speed up my algorithm...

Asked by:

Hi everybody,
I would like to speed up my program because it is very slow for large input data
this program calculate arithmetic coding for input data

input:=[144,144,108,94,92,93,96,96,96,96,96,99,95,101,101,97,98,93,95,100,96,94,95,98,97,95]:
R:=[seq(j,j=0..255)]:
# calculate frequency table
p:=proc(x)
local k;
global cp:
cp:=0:
for k to N do
if (input[k]=x) then cp:=cp+1 fi
od:
cp/N
end:
G:=[seq(p(i),i=0..255)];

## "cannot creat the java virtual mechine"!! urgent...

Asked by:

Hi,

My maple 11.02 appears to have some problem of lunching...

I can start Classical Worksheet though, but not Maple 11...

error:  cannot creat the java virtual mechine

I have tried to re-install Maple after uninstalling ,however it dose not help..

someone has any suggestion?

Thanks in advance

## implementing algorithm in C and call within Maple...

Asked by:

I hope to reimplement an expensive algorithm in Maple over windows. The suggestion I got is to write it in C and call it inside Maple. However, the algorithm itself is quite complicated and the linux version uses saclib2.1 library which provides many useful implementations of numerical routines.

I therefore wonder if Maple provides its own C or C++ math libraries, so that I don't need to implement everything by myself?

## differentiation y^2+(x-c)^2=c^2 w.r.t. x...

Asked by:

Hi,

How do I ask maple to differentiate y^2+(x-c)^2=c^2 w.r.t.  x ?

it's defnitely not implicitdiff

I think I knew this before...then I just cant remember...

Thanks in advance.

## join in the direction fileds...

Asked by:

> c:=-4:
> FM1:=DEplot(diff(y(x),x)=-c/x^2,y(x),x=-10..10,y=-10..10,color=red):
> FM2:=DEplot(diff(y(x),x)=x^2/c,y(x),x=-10..10,y=-10..10,color=green):
> display(FM1,FM2);

how can I join the direction fileds together?

i mean just like plooting the solutions of the ODEs..

I want to do with "linestyle"..tried, but dosent seem to work...

## Easiest way to extract data from an excel spreadsh...

Asked by:

Just wondering what the easiest way is to extract data from an excel spread sheet so that it can be used as data in a maple worksheet.  For that matter, what other database programs can I use with maple?

Thanks.

## Typing Documents Containing Trig Graphs And Plane ...

Asked by:

Is Maple (student version) appropriate for typing non-professional documents containing trigonometric graphs and 2D shapes?

I would like to plot functions like sin(x)  with the horizontal axis labeled in multiples of pi, and draw polygons with angles labeled.

## How to incorporate Maple 9.5 into Windows...

Asked by:

I'd like to copy and paste the following from Maple 9.5 into a Windows 2000 text:

lim x-->0  .

The trouble is,in Maple you can't write x-->0 as a subscript to the word "lim". That is how you HAVE to write if you're writing a maths thesis. Can someone please tell me how I can overcome this problem? Thanks

Ian

## Authentication - anybody using Apache/Kerberos?...

Asked by:

We are looking to use TA.  Our Uni common authentication system uses Apache/Kerberos.  Is there a way of getting TA to use the Apache-supplied authenticated username?

The documentation seems to suggest the only options are TA's internal user/pw system (where I saw something that suggests the p/words are held in plain text(!)) or an LDAP server.

Grateful, as always,  for any insight.

Toby

## Can anybody help me solve this transcendental equa...

Asked by:

The equation like that:

a*(x/sqrt(x^2-1)+2*x/(Pi*sqrt(x^2-1))-1-2/(Pi*x))=1

when i used solve command in Maple, the result is :

RootOf((-Pi^2-2*Pi^2*a)*_Z^6+(2*Pi^2+4*Pi^2*a+a^2*Pi^2)*_Z^4+(4*a*Pi+4*a^2*Pi)*_Z^3+(-a^2*Pi^2-2*Pi^2*a-Pi^2)*_Z^2+(-4*a*Pi-4*a^2*Pi)*_Z-4*a^2)

this result is not what i want, i need exactly solution.

Can anyone help me?

Thanks very much for your help!!

## How do I Generate Random Numbers with Correlation ...

Asked by:

Hi, I am trying to generate 20*10000 random numbers with Logistic distributions and a 20*20 correlation matrix, but I don't know how to do so. Could someone help me on this topic?
Thanks!

## Input/Output Table...

Asked by:

Hi All,

Could someone please tell me how to create a simple input/output table from an equation such as y=x^2 + 2 or lead me to a task from which I can cut and paste and change parameters.

Thanks in advance.

Bob

## phase portrait...

Asked by:

Hi, using a solution of u that I have already calculated from an ode (by the method of multiple scales), how would I plot a phase portrait of u' against u??  All help is greatly appreciated.  Many thanks in advance.

## Integral question...

Asked by:

Hi, I'm new to maple and to the site.

How do I find and / or graph a double or triple intral over a implicit function?

for example I want to find the volume         / /  x^2  dA                over the ellipse x^2 + y^2 - xy < 2.

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