I'm using maple 16 to do a surface plot w/ plot3d of a fairly complex integral. The integral involves a number of nested functions. The plot ends up taking a very long time. The surface appears to have many holes in it. In fact, only about half of the surface is plotted, and the rest looks like empty space. I know that the integral/function is defined at these empty points, because I can evaluate it there and get a real number. What can I do to fix this? I've tried different...

My problem is that I have two functions in two variables, say x and y. The functions are both polynomials in x, but sometimes y appears in an exponent. What I want to do is find the gcd of these functions as if they are viewed as polynomials in x. However, when I use the gcd command it says it can not do it because the arguments must be polynomials. I have tried redefining the functions as just functions in x (i.e. h(x) = f(x,y)), but it still does not work. So is there anyway...

At any age we, being somewhat children, ask that. Here is the answer to such a question related to Maple. Let us consider the ODE

ode:=(2x^2-x-1)*y''(x)-(4x^3+x-2)*y'(x)+(4x^3+2x^2-2x+2)*y(x)=0;

and its general solution done with Maple

dsolve(ode);

y(x) = _C1*exp(x^2)+_C2*exp(x)*x.

The first thought is that Maple, mimicking the solution done by hand, finds a particular solution of the equation in the form y*(x)=exp(a*x^2+b*x). It fits...

Hi,

I'm trying to develop a new notation and am having problems with lists vs. sets.

Basically I have things of the form [[a,b]],[[c,d,e]],[[f],[f,h]] and I want to change them to the form [{a,b}],[{c,d,e}],[{f},{f,h}].

I start from a flat list [a,b,c,d,e,f,f,h] and then divide it up, so using sets initially would lose repeated elements. But then once it has been divided up, I need the innermost brackets to be sets.

I recently purchased a new MacBook Pro (retina) with Mountain Lion and found that my Maple 12 programs would not run.  So I updated to Maple 16.  Initially all seemed to work well.  But now when i try to open a Maple .mw file, I get the message

"File acm23test.mw could not be found.  Please select a different file."

What has happened and how can I get my programs working again?

DavidR

Hello guys , i have a matrix that i want to find its eigenvalues , i have its answer but maple calculations didnt give its anwer.

answer:3(1+q),{-3m+sqrt(m*(256m^3+160m^2-31m-16)}/4m(m+1),{-3m-sqrt(m*(256m^3+160m^2-31m-16)}/43(m+1)

m and q can bu any number

maple calculation :

eigen.mw

thank you guys

Is it possible when solving a differential equation to get the corresponding recurrence relation of the series expansion instead of the actual solution?

e.g.

ode:=y''=omega^2*y(x)

the solution is obviously exp(\pm omega*x)

But I want

a_(n+2) = omega^2/(n+1)(n+2) * a_n

or something like that

1. nonlinear ODE with parameter "epsilon"

(x^n +epsilon*y(x))dy/dx + n*x^(n-1) * y(x) =m*x^(m-1) ; y(1)=b>1

where n=2,3,4,.. and m=0,1,2,3,...

2. Duffing equation with parameter "epsilon"

d^2 y(x)/dx^2 + y(x) + epsilon*y(x)^3=0 ; y(0)=A ; y'(0)=0

Hi

I want to make my maple.ini file so that it sets plotoptions(discont=true) as starndard, so that I don't have to write it all the time.

I did it a couple of years ago, but can't make it work now.

Hope some of you can help me.

Regards

Michael

Hi,

I'm plotting this function of (x) which is very complicated expression anyway I plotted it..Now I want to plot the f(x)/max value of f(x)???

I appriciated for any advice...

Hi, im new with maple

so I am still a bit confused with how to use it..

i have an nonlinear ODE with parameter "b"

(x+b*y(x))dy/dx + y(x) =0 ; y(1)=1

if i want b=0.1 and x=0, 0.1, 0.2, ..,1

how do i

M = (1+y^2)/((x^2+1)*(1+z^2))

Anyone have any background knowledge on the above 3D polynomial?  Assuming all 4 parameters are real I ploteed some 3D plots & some interesting surfaces are generated.  I imagine this has some physical application.  If anyone has some knowledge on this please respond & include any references you might know of.

Thanks

I tried using maple to solve the below system of Partial differential equations but itzz not jst coming out... any assistance will be appreciated (post the maple codes if used)

sys2 := -(diff(u(y, t), y, y)) + S*(diff(u(y, t), y)) + diff(u(y, t), t) + M.u(y,t) + (u(y,t)/k)-theta(y,t) = 0,
 -(diff(theta(y, t), y, y))/Pr + diff(theta(y, t), t) + S*(diff(theta(y, t), y)) = 0

The variables are... u(y,t) and theta(y,t)

The initial conditions are;

Hello,

I am having some trouble with a recursive formula which I instead turned into a loop to avoid any errors. I defined an array before starting the loop and defined the last index as a floating number (this will be the initial point used in the loop). Within the loop, I first defined my recursive formula (which contains other arrays that are indexed; everything is switched to floating points) and it equates without trouble. Underneath this (still within the loop...