How to convert this equation?

RootOf(_Z^2+alpha+_Z, label = _L3)

and why this programme take long time to evaluate?

Hello,

Is there anything similar to the file selsction box in VB. I´ll give the user the possibility to choose which txt-file should be read in.

BR
CHR

Hi, i am new at this forum, and i was wondering if somebody could help whit a  non linear differential equations system, is it posible to know what kind of system is? (damped, overdamped etc) and the time of response, does exist any method to do that?, the system is this:

dp1/dt =exp-(c + p1 + q1)

dq1/dt=exp-(c+q1+p2)

dq2/dt = exp-(c+q2+p1)

dp2/dt = exp-(c + p2 + q2)

Hi all,

sorry for my cryptic previous posting. Here is my question again:

I am searching for an easy way to determine the sign of a function

m(a) = 1/4*(-2*g+ln(1-l+a)*g-(g*ln(1-l+a)*(ln(1-l+a)*g-4*g+8*d*a-8*y))^(1/2))/g .

More specifically, I want to find out whether m(a) can assume a positive value given that

(1+l-a) lies between 0 and 1 and all parameters (g,d,l,y) are nonnegative (I have plotted the function; the plot exhibits that the fct does not assume a value greater than or equal to 0. However, I want to have an algebraic solution).

I have a function that PLOT (2D) refuses to write all the way out to x=0.01 .  It stops the curve at x=0.005 or so, no matter how hard I try to make it do otherwise.  When I make a POINTPLOT from a SEQ generated from the function, then I see the full curve.  Can anyone tell me what is wrong before I send this problem in to tech support?  I am sure the function is defined and continuous.  Ratch

Hi!
I am a student and have recently started using Maple.can anyone help me for the following problem please!

 well i have a system of four partial differential equations in Maple with 04 variables P(x,y) , Q(x,y) ,  R(x,y) , S(x,y).

 the 1st eqn :          P + P^3 + Q^2 - R=0

 the 2nd eqn:        Q + Q^2 + P^3 + S=0
 

 the 3rd eqn:         diff(P,y) + S = 0

this is a practice question that my professor give us. we need to write down the procedure

Given a list L of size N, split it into two equal size
lists L1 and L2 such that
– L1 = L[1..N/2]
– L2 = L[N/2+1..N]
• Use Select Sort to sort list L1
• Use Select Sort to sort list L2
• Merge the sorted L1 and L2 into a list L3 suchthat L3 is sorted.
• Print list L3

thanks

we are not allowed to use any build-in procedure such as Max

 

When I plot(cos(2*x^2)) the plot doesn't look right.  The graph area between -7 and -8 jumps and similarily on the positive x-axis.  It doesn't appear to affect values just the visualization of graphs.  If you plot(cos(2*x^2),x=-7..-8) the graph is fine. 

Hi,

can Maple evaluate repeated compositions in a symbolic way?

q:=x->x+1;
(q@@n)(x);

expected result::

x+n

 

Thanks

I want to interpolate two colors

CI := proc(r)
   local X, Y;
   X := [0, 100/255, 0];  Y := [1,1,1];   
   #return r*X+(1-r)*Y
   return [r*X[1]+(1-r)*Y[1], r*X[2]+(1-r)*Y[2], r*X[3]+(1-r)*Y[3]]
end proc: 

plot3d(0, x=0..1, y=0..1, style=surface, axes=boxed, orientation=[-90,0], color=CI(x));

works. However the first version with return r*X+(1-r)*Y fails. Why? Both give the same result for CI(0.9) and true for type(CI(0.9),list).

Thanks,

Peter

Hello,

Is there a direct way to calculate the area of the following 2D region in Maple (analytically or numerically).
The borders of the  region: y=x, y=2*x, x*y=1, x*y=2 {x>0,y>0}
Is it possible to define such region for integration (symbolic or numeric) in Maple?

Hi

Some time ago I started to write my own modules.
I've a problem with a module calling an export of another one. Both have the "package" option.

The first module, Math_Tools_ex export a "diffindice" procedure. I copy here the relevant part of the code:


####################################
Math_Tools_ex:=module()

export diffindice, doublederivcov,Dimensione,mix, Test_Symmetry, Double_dag ;
export Coords,A,M,G, Abstraction;
global X, c, dimensione,abstraction;

Hi, can some one help me solve this differential equation. diff(y(r), r, r) = -2*(diff(y(r), r))/r-1.910049266*10^5*polylog(3/2, exp(-0.4813739e-1+0.203e-2*y(r))) the boundary conditions are: y(infinity)=0, Dy(0)=0 Thank you MS

Hello,

How can I count the rows of a (m,n)-Matrix.
describe[count](M) or something else??

BR
CHR

I can insert a table from the Insert menu > Table ..., and I can modify all its properties etc. But is there any way I can "populate" a table with data? Say, for example, this table, on p.167 of my set book, http://books.google.co.uk/books?id=AKsLy0rVGuwC&pg=PA165&lpg=PA165&dq="richardson's+extrapolation+with+five+terms"+"advanced+mathematical+methods+with+maple"&source=bl&ots=ngJbnsw304&sig=D7yj31K_CMLwtvBWo62MXph0qBY&hl=en&ei=KzgWSvu9Gca5jAf2lsX_DA&sa=X&oi=book_result&ct=result&resnum=1#PPA167,M1