## Descrete Math...

How do I use Maple to apply depth-first search to a graph to obtain a depth-first search of numbering of the verticies. Once again I need to input my graph in order to retrieve this information. How does Maple provide this info based off my graph?

## Integro-Differential Equations...

This is my system: rho * diff(diff(delta(x, y, t), t), t) = (y ^ 2 / 0.2e1 - d ^ 2 / 0.8e1) * Y * diff(diff(diff(diff(xi(x, y, t), x), x), x), x) + (((2 * G + lambda) * v - lambda) * diff(diff(xi(x, y, t), x), x)) + 0.16e2 * Q(t) ^ 2 * y * (d ^ 2 - 0.2e1 * y ^ 2) / d ^ 4 / b ^ 2 / l ^ 2 / e; diff(delta(x, y, t), y) = v * y * diff(diff(xi(x, y, t), x), x); i = 0.8e1 * Df * Q(t) / d ^ 2 + l * Lp * (int((2 * G + lambda * (v - 1)) * diff(diff(xi(x, y, t), x), x), x == (0..b)) + Y * d ^ 2 * int(diff(diff(diff(diff(xi(x, y, t), x), x), x), x), x == (0..b)) / 0.12e2) + diff(Q(t), t); My objective is to obtain the expression of delta,xi and Q to the space coordinates(x,y) and time,t.The other letters are constants. Can the maple do this? I try with pdsolve but obtain this error:

## Hoe to solve a boundary value problem...

I need to solve following ODE: ODE:= y(f)*(diff(y(f), f, f))+50.0*f -50.0*f^2= 0 Subject to boundary conditions: BC:= (D(y))(.5) = 0, y(0) = 0 I used BVP method : dsol2 := dsolve({ODE, BC}, numeric, method = bvp[midrich], y(f), range = 0 .. .5) But I got " Error, (in dsolve/numeric/bvp) division by zero" Can someone please tell me what I can do. Thanks, http://maplenet.maplesoft.com/maplenet/worksheet/mapleprimes/4384_BVP.mw

## Maple - easy talking to DLL...

Something I hadn't tried until today was calling into a DLL with Maple. I was surprised at how easy it is. Once inside a DLL, the sky is pretty much the limit as far as passing the data around between applications for realtime plotting and even passing to device drivers for other processing or even I/O in WinXP.

## querying the 'view' option of a graph...

Is it possible to get/set the view option of a plot component using the DocumentTools package? I'm trying to plot a function containing a parameter whose value is controlled by a slider component. When I adjust the view using rightclick->manipulator->scale and then move the slider, the graph reverts back to the hard-coded scale in the original plot command. I'd like to set a default scale, then allow a user to set the scale using the scale manipulator and have that new scale persist through the next slider manipulation.

## Last Year's (2006) Maple Conference...

Did anyone here attend the 2006 Maple Conference ? If so, is anyone willing to share some of the papers from the collected proceedings ? I would just like to see what new exciting developments were created from the global Maple community. v/r,

## markov model & plot a derivative function...

i create an availability function for my markov model in which use constraits like 2 maintenance tresholds and some maintenance duration, mean time between failures. i want to determine the mean time between inspections value which max. the availability and plot its graph... should i have to give exact numerical values or is there any other ways to solve it..

## Who is behind ScientificComputing blog?...

Does anyone know who the author of the Scientific Computing blog on blogspot?

## Relaxtion method to solve Ax=b...

implement a program for a matrix a a vector x and numbers eps>0, omega e(0,2) approximates the solution of the system Ax=b by relaxation with parameter omega and accuracy eps the program should stop when last iterations x[i-1],x[i] and x[i+1] satisfy norm(x[i+1]-x[i]> norm(x[]-x[i-1]

## Plotting 3D...

Hi, Sorry but i ve repeated the same question a few days ago but because it was quite down the line i thought to give it another shot I would like to make a 3D plot of some density functions(F(X)) where each lets say cdf, corresponds to a time value.So far Ive tried using the transform((x, y) command.The example below where I show how I have worked out for 4 cdfs corresponding to 10,20,30 and 40 ms, hopefully it will make it clearer of what i mean.(I have a thousand of different distributions up to 10 secs). with(stats): > C001:=plot(statevalf[cdf,lognormal[0.3792,0.9556]], 0..4, colour=green):

## Brownstone unavailable: alternatives?...

Hi,

we've been happily using Brownstone's latex -> edu conversion service for some time now, but always with that slightly queasy feeling of "what happens if it's unavailable?". Well that's the case at the moment: I've submitted a ticket with their support folk, but times in Australia don't match up well with US times! In the meantime we have a number of assignments due to be made available to students, but which only exist as latex files. Conversion by hand is, to say the least, painful and time consuming (our Level I coordinator has already converted two by hand, and doesn't need another few hours of such nonsense), so I'm hoping that there may be another way in which this can be done. Any suggestions?

I have a class with about 400 students. For the new term I opened a new class which will have about the same audience like the one before. Therefore I would like to copy all student accounts but start with empty gradebooks. As far as I saw it's possible to upload a class roster but it's not possible to download it. Could anybody tell me an easy solution for this problem?

## optimize code...

Can you haep me to optimize this code? for s from size by -1 to 1 do Vpq[1 .. dim, 1 .. dim, s] := (ArrayTools[ElementMultiply])(Rpq[1 .. dim, 1 .. dim, s], map(exp, -I*pq[s, 2]*Theta)); end do; # Vpq[1..dim,1..dim,s]:=Rpq[1..dim,1..dim,s]*exp(-I*pq[s,2]*Theta[1..dim,1..dim]); where Rpq:=Array(1..dim,1..dim,1..size); pq:=Array(1..size,1..2); Theta:=Array(1..dim,1..dim); with dim:=100; size:=1300; I must work with simbolic precision, but the code is very slow! Thanks

## Zernike moments, time and memory...

View file details Can you help me to create a code that calculate zernike moments, Zpq, with an image of 100x100, p=q=70? The formula is indicate in the file. the objective is to use the symbolic calculus!! The problems are the time and the memory!!! thanks for your help