Good day,

Proc_-_Mapleprime.mw

I was wondering what goes wrong with the procedure I wrote.
I inserted a short example, otherwise I didn't know how to explain it.

When looking at the Maple sheet:
It concerns determining the eigenfrequency and then specify a factor to that eigenfrequency.
The first plot is the 'critical range expressed in FREQUENCIES'. I plotted this using a procedure.
Now in the second plot I converted the first plot, which is expressed in FREQUENCIES, to a certain critcal range in LENGTH.

Now my point is that I would like to view the reductiefactorvoetgangers(lengte) when I type in for example lengte:=22; but it gives an error. I don't understand why it does that.

In case of the first plot (expressed in FREQUENCIES), i can just simply fill in eigenfrequentiesysteem:=1.7 and then it gives me an answer for reductiefactorvoetgangerseigenfrequentie(eigenfrequentiesysteem) which is equal to 1 (which is correct).

So if anyone can tell me what I do wrong, I would appreciate.
Thank you

Greetings,
Frank 

Bonjour,

L'expression

L'exprission kw ci-dessus est une procédure en polynôme Pol de variable "p". Est-il possible de simplifier la valeur k:=kw(Pol)? Sur Mon portable, à certain moment de calcul, je vois que maple est presque bloquer.

#=============================================================:

> restart:
> with(LinearAlgebra):
> kw:=proc(Pol)    
> local a0,a1,a2,a3,R,alpha0,alpha1,alpha2,k:

Hi, 

The maple 16 installed on my win7 system does not work because its gui worksheet does not accept any symbol input (except the plus sign).  For example, the cursor become frozen once a minus sign is input. The classical worksheet works well. 

On the test I had today I was asked to find the derivative of x^3+3*cos(x) using the definition of a derivative. The (f(x+h)-f(x))/h type.

So i set my function and then used the definition and then tried to simplify. Unfortunately the bottom h is still there so when I try to evaluate the function when h=0 it returns an obvious problem. It can't divide by zero. Usually when I do this the h on the bottom will be canceled out, but it wouldn't do it for this one. Does...

hello,

i know that to define a complex number z = a+bI

now i need to know how to define a complex number in 3d like f= f_x i + f_y j + f_z k

I think this is equation to plot 

plot3d((x/(13.2))^2+(y/(24.3))^2+((1/22)*z)^2 = 1, x = 10 .. 12, y = 10 .. 20, z = 10 .. 20)

but why its not plotting

pl help

Hello All 

I looking to write Maple code procedure to solve this equation 

restart;
with(PDEtools):
with(plots):
with(LinearAlgebra):
pde := diff(psi(t,x),t,t) - diff(psi(t,x),x,x) + V(x)*psi(t,x);

where V(x)->x^2;

I have to use this stencil 

u[i+1,j]=-u[i-1,j1]+(1-1/8*h^2*v[i-1])*u[i,j-1]+(1-1/8*h^2*v[i+1])*u[i,j+1]; where i is spatial step and j is time step

Thanks 

Hello,
I have a question concerning the change of the results of Maximization procedure and it will be much appreciated if you could help me.
The case is: I need to find the maximum of a function (call if f(t)) given a range of values of another function (call it g(t)).Both sets of parameters are the same. I use "Maximize" command, but I need to plot the the results on (f,g) plane afterwards. How could I change the Maximization output in order to have only objective function...

int(y^2/2 - lambda*(u*diff(y,t)-diff(u,t)-a), t);

with(Physics):

diff(y(t)^2/2 - lambda(t)*(u(t)*diff(y(t),t)-diff(u(t),t)-a), u(t)); # u -> something

diff(lambda(t),t) disappear

should be

diff(lambda(t),t)+Physics[`*`](lambda(t), diff(y(t), t))

diff(y(t)^2/2 - lambda(t)*(u(t)*diff(y(t),t)-diff(u(t),t)-a), y(t)); # y -> something

u*diff(lambda(t...

I would like to take the sin of a procedure, but it keeps giving me an error. Is it possible at all, or should I rewrite it into a matrix?

like this: sin(proc(x)...end proc)

following expression doesn't simplify to 1

conjugate(1/sqrt(I*t*lambda+m))*sqrt(lambda^2*(t^2)+m^2)*(1/sqrt(I*t*lambda+m))

Now I did use assumptions on any variable

specifically: assume(lambda>0,t>0,m>0)

Then I tried radnormal, simplify, evalc, combine(expr,radical)

But none of these work.

Hey (again) everyone. I'm back with a question similar to (but never answered on) this post: http://www.mapleprimes.com/questions/152116-Maple-Doesnt-Recognize-Function-Definition

The problem here is almost identical, except now it won't let me define a procedure. It's very bizarre. Here is my sheet:

The following equation represents the magnification (A) of an object given its distance (s1) from a closed optical system.

How can I determine the range of s1 that will provide a magnification (A) range of 2.5 to 5?

Dear maple team.

I would like to suggest something about the treatment that Maple makes of arithmetic modulo 2.
If you write the command:"x+x mod 2", the Maple output is "0", because "x+x" is always even. Perfect.
The problem I have is:
When  you write "x^2 + x mod 2", the Maple output is "x^2 + x"  instead of "0". Maple doesn't takes into account when simplifying that all the variables are idempotent modulo 2 (i.e, x*x = x)

If I write