Hi

Suppose I do the following definite integral:

Int(cos(m*x)*sin(n*x),x=0..Pi) assuming m::integer,n::integer

I recieve

-(2*m+2*(-1)^(1+m+n)*m)/(2*(-m^2+n^2))

Since I don't want to be mistaken wiht the first minus sign I do

collect(I1, m, normal)

Is there a way to tell Maple that m+n is odd or even since the answer depand on this information.  Of course, in this case, we can see immediatly but just for the peace of mind.

Mario

I am attempting to intergate with maple, also using Vecotr Cal. notations and have come upon some errors.  Maple tells me it is unable to match deliminators.  What does that mean?  I am new to using Maple and lost in it.

 

Thanks,

Stacey

 

I used rand() to get a list of random numbers between 0 and 1. It gives me something like

[.30000000, .50000000, .20000000]

But I want this to be like [.3,.5,.2]. As my code tells that both the above lists are unequal !!! How ? kindly explain me.

regards,

Athar

Hello everyone,

Can anyone describe me how to invert a function in Maple 9.5? The following, in particular:

piecewise(x<=20, 100-x-(3/80)*x^2+(3/1600)*x^3-2*x, x>=20 and x<=fsolve(1495/16-(201/64)*x+(33/1280)*x^2-(3/25600)*x^3=0), 1495/16-(201/64)*x+(33/1280)*x^2-(3/25600)*x^3)

Thank you in advance.

Ozgur

I have the following diff equation with IC that I am trying to solve but I always get the "invalid specification of initial conditions" message. Here is the definition of the function and IC:

alpha:=0.024:g:=9.81

var:={x(t),z(t),dx(t),dz(t)}:

eqn:=diff(x(t),t)=dx(t),diff(dx(t),t)=-0.51*alpha*dx(t)*v(t),diff(z(t),t)=dz(t),diff(dz(t),t)=-g-0.51*alpha*dz(t)*v0(t):

initcond:=x(0)=0,z(0)=h,dx(0)=v0*cost(theta),dz(0)=v0*sin(theta):

h:=1,v0:=25,theta:=15,w:=20:eta:=1:

sol:=dsolve({eqn,initcond},var,numeric);

Simple question: Can Maple plot x = 3

Allan

Hello Experts,

I'm relatively new to maple, and I wonder why I don't grok even this simple problem.

Okay, So I'm running Maple 11 on a Mac with 4 gig of RAM. However my mserver keeps crashing due to running out of memory. The intuitive solution to this is obviously to increase the datalimit through kernelopts, when I try to do this I am informed that I can't exceed the hard limit, i.e.: >kernelopts(datalimit = 409601); Error, cannot raise the datalimit above the hard limit As we've already established I've got rather more memory available than that and it doesn't seem to be restricted by the unix kernel: ulimit -a core file size (blocks, -c) 0

How can I give the general solution to v''(t)+v'(t)+v=0, because I can only draw the solution. deq:=diff(y(x),x)=x^2+x+1; value(%); Thanks nevulosa

Any tips on how to solve fixed endpoint problems in the calculus of variations?

For instance,

Find the extremal for:

int(diff(x(t),t)^2/(t^3),t=1..2) with x(1)=2 and x(2)=17.

The correct answer is x(t) = t^4 + 1.

Hello I have a table of x values and y values and after plotting them I found a trend line by least square. But at the moment of plotting the values and the trend line, this last one doesn't reach all the plot width. How can I enlarge its reaching? Thank you,

hello, first post here.

i'm attempting to solve the 1 d heat equation using a finite difference scheme, with continous boundaries eg.

 

Where I can get right and complete instructions for read .txt files from Maple 7 ? 

I follow the instructions like:

L := ImportMatrix( "data.txt", delimiter=" " );

for read a deta.txt file, or others like fopen, etc, and do not get the data.

 

How do I plot in the simplex with Maple [11]?

I am working with variables x1,x2,x3, each non-negative, and summing to one.  Thus, the triangular 2-simplex is an easier environment to work in.

Thank you in advance,

Colin Rowat, Department of Economics, University of Birmingham

 

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Hello All,