Could you give examples of differentiate differential form or integrate differential form using maple?

A friend asked me if Maple can do the following integral, since Mathematica just spins for an indefinite time with it:

 

int (  (1/sqrt(2*Pi))*(1/(1+exp(x)))*exp(-(1/2)*((x-a)/b)^2) ) from -infinity to infinity

 

Interesting integral though!

Dear friends,

The commands below generates a graphic. Hower I would like two things:

1. That the Y values are from 0 to 0.7 (in the example before it goes --by default--only until 0.5).

2. To represent in the X-axe the values from from 1-10, 100-110 and 500-510. I do mean, axe-X excluding 11 to 99, 111 to 499.

Here the commands:

restart:
ww:= [seq( [n, add(1/(n+1), k=ceil(1/3*n)..floor(2/3*n))], n=1..10)]:
plot(ww, style=point):

I have 2 sets of nonlinear motion equation for double pendulum problem. I wonder how can I solve these second order nonlinear equations first and second how can I extract the state space model for this system.

Thanks in advance

I have a DLL which contains many function for the 1997 IASM steam tables.

As an example (in SI units)

> dllloc := "c:/Windows/system/astemdll.dll";
                      "c:/Windows/system/astemdll.dll"
> psat := define_external(psat97mc, FORTRAN, arg1::(float[8]), RETURN::(float[8]), LIB = dllloc);
> b := psat(647.096);
   ...

Version: Maple 7

How can I acheive the following?

Pseudo-maple, this is what I want to happen.
> f:=modp(x,2);
> subs(x=3, f);
(output) 1

The problem is that the first line echoes "f:=x" and then subs(x=3,f); outputs 3.

In a similar way, I get the following unexpected result,
> f2 := 0.5 < floor( modp(floor(y/17)* 2^(-17*floor(x)-modp(floor(y),17)) ,2) );
(output) f2 := .5 < 0

For some reason the RHS of...

This is an equation:T*s^3+s^2+K=0,where T>0,K>0, s is complex variable. I have known that one of its roots has real part, and this real part is independent of T and K. I don't know how can I use maple to illustrate this conclusion, can you give me some advices? I try to use solve command, but the result is very chaotic.

Thank you in advance.

Here is my code , could you please tell me where i'm going wrong... isn't plotting anything

Fern :=proc(n);
local pick,n;
n := NULL;
for n from 1 to n do 
pick := rand();
if pick < 0.01 then
x[n+1] := 0;
y[n+1] := 0.16*y[n];

else if pick < 0.01 + 0.85 then
x[n+1] := 0.85*x[n] + 0.04*y[n] + 0;
y[n+1] := -0.04*x[n] + 0.85*y[n] + 1.6;
else if pick < 0.01 + 0.85 + 0.07 then
x[n+1] := 0.2*x[n] - 0.26*y[n] + 0;
y[n+1] := 0.23*x[n] + 0.22*y[n] + 1.6;

Hello,

I am working on a problem that I can't seem to figure out the plot commands in Maple. The problem is this...

Given a family of surfaces described by z=(ax^2 +by^2)*(exp(-x^2*-y^2))

I need to obtain a 3D plot of these surfaces and, from the graph of the surfaces, explain how constants a and b will change the shape of the graph. I cannot find the syntax required so plot such a function, but I have been trying using spacecurve(). Does the equation...

Hi everybody:

I just recently "discovered" Maple components based on an interesting blog posted by Dr. Lopez and I am trying to figure out what's really possible. Is it meant for "Big Time" or for small (but still usefull) things? Specifically, I don't see any provision about creating custom components. Not even as simple as an on/off switch. For sure you can combine the ones from the palette and achieve certain customization but you're going to waste quite a bit...

Hi

I am trying to run the following sample code

http://www.maplesoft.com/support/help/Maple/view.aspx?path=OpenMaple/Java/Examples

 

but I get error msg

fatal error(-1) loading GMP library: C:\Programme\Maple 12\java\bin.win\libgmp-3.dll

 

"Error Lauching openmaple splash screen"

 

the file "libgmp-3.dll" is in the correct directory

 

I am using Maple 12, jdk 1.6.0_23 and WinXP

First a little background: I am using Maple 14 on a Windows 64 bit machine.

I first imported some x,y data using the readdata function. Then I made a Spline function from this data like so: f :=x->Spline(data,x);

Then I created a second function, lets call it g(z) which calls f like so: g:=z->f(1/z);

If I simply try to evaluate g(z) at a point it works. But if I try to plot g(z), like so: plot(g(z), z=5..7) I get the error: Error, (in CurveFitting:-Spline...

Question: (how to do this)

Write a procedure that takes as input a lowercase text string and returns a list 26 integers.
the fist entry is a count of the number of letter 'a's,the second the number of lette 'b's ,.... , the 26th the numberof letter 'z'.


Thank you 

dear all,

          i have a simple optimization problem. the objective function is like A*X + B = E and the constraints are 100 <E < 8000 and 10<X<600. I want to find the Min and Max ranges of A and B such that Amin*Xmin+Bmin=Emin and analogous for maximum. I am not sure about the correctness of my modeling. Please guide me to proceed. Thanks.

I would like to ask, whether MAPLE can compute expressions written in covariant notation, like these ones (I have written it in LATEX): $u^{\mu \alpha}_{\nu} u_{\mu} u^{\nu} v_{\alpha}$, (where $\mu, \nu, \alpha = 0,...3$), i.e. whether we can compute the summation (like in these above examples), contraction, substitute ansatzes for $u$, compute derivatives of this above expressions, etc. I looked for any information in documentation, but I did not found anything. I checked,...