## How to Extract Real Solutions?...

for having just the real solutions in the output of the solve command is it enough to use the RealDomain Package?Is there any other way for extracting only the real solutions?

## isolate a subexpression...

Hello, I bought Maple 11 for its algebraic manipulation capabilities, but I can't figure out how to do this: Given, for example, Vs/R1 = (Vs - Vo)/R2 I want Maple to solve for Vo/Vs = ??? I can isolate a single variable (either Vs or Vo), but that is not what I want. Thanks!

## Get the real and imaginary part of a complex expre...

Hi, I am new in maple, and I would like to get out the real and imaginary part of an expression. My function is as followed: eps*(f)=epsinf+Deltaeps/(1+(i*2*Pi*tau*f)^(1-alpha))^beta where eps* is my complex function with parameters: epsinf, Deltaeps, tau, alpha and beta. f is my variable. This function is known as havriliak Negami function in Physics, which describe the behavior of the dielectric susceptibility for a relaxation. In litteratur, I can find the real and imaginary part of this function, but first I would like to verify it... How is it possible to get the real and imaginary part of this function?

## parameterize equation...

Can someone help me with this?? i have x^2+y^2+z^2=1 and y=z and now i find the equation of their intersection which is x^2+2z^2=1 but then i have problem parameterize it since i let x=cost, y=sint, and since y=z, then z=sint but if i plug it back to the equation (cost)^2+2(sint)^2=1, which is not correct, can someone help me wut to set for z?? Thx

## Distance between two parallel planes...

So I am taking multi variable calculus this semester and we have been asked to use maple to complete an assignment. I have never used maple before so I tried to read the tutorial we were given. Anyway, it was written by some incompetent fool as I am now more confused than when I started. The concepts are appallingly illustrated and I have no idea what to do. I have attempted to do most questions and I will probably get part marks for most, but I am completely clueless regarding this one. The Question is as follows: "Determine the distance from the plane 2x + y - z = 1 to the plane 2x + y - z = 6"

## Multivariable Calc, distance between planes......

So I am taking multi variable calculus this semester and we have been asked to use maple to complete an assignment. I have never used maple before so I tried to read the tutorial we were given. Anyway, it was written by some incompetent fool as I am now more confused than when I started. The concepts are appallingly illustrated and I have no idea what to do. I have attempted to do most questions and I will probably get part marks for most, but I am completely clueless regarding this one. The Question is as follows: "Determine the distance from the plane 2x + y - z = 1 to the plane 2x + y - z = 6"

## choosing tickmarks in logplot...

Hello everyone, I have a problem with Maple 11's choice of tickmark spacing in a logplot, >pdata := logplot(points, style=point, symbol=circle, thickness=2, color=red): The resulting plot has the y-axis tickmarks located only at [1 x 10^n, 5 x 10^n, 1 x 10^(n+1), 5 x 10^(n+1), ...] How do I make Maple show the more conventional log-scale tickmarks at [1 x 10^n, 2 x 10^n, 3 x 10^n, ..., 1 x 10^(n+1), 2 x 10^(n+1), ...] Thanks much for your help! -Dan

## Integration constants help...

Hello, I appreciate this forum because NOT one of my questions has been answered by the Maple help, which I think is very poor. The question I am working with has to do with the arbitrary constants that maple puts into the solution to differential equations. I have two differential equations which, when solved, will be set equal to each other. Now the equations are second degree so they both have two constants associated with their respective solutions. The problem is that when I set the solutions equal to each other, the constants will be different, but I can't seem to rename them from the standard _C1 etc. Here is what I tried:

## Kernel connection lost...

In a previous thread I, most thankfully, learned that if B := A for some Array A, then B will not be a reinstantiation of A, which is most simply ascertained with the command eval(A = B) which here evaluates true. On several occassions, though, I would like reinstantiation. This, I found out, can be done in at least two ways; B := Array(A), or B := map(eval,A). However, in such simple reinstantiations information about for instance any indexing functions of A is lost. But they can be propagated using the ArrayIndFns(...), as seen from

## Quadric Surfaces and Space Curves...

Can someone help me with parameterizing equations and plot it into maple to show the graph For example x^2 + y^2 + z^2=1 How do i parameterize it for each of the traces and turn the equation into a space curve in R^3? Also, how do i plot the surface and the curves together on the same plot, using a grey wire frame for the surface, a black line for the x=k trace, a blue line for the y=k trace and a red line for the z=k trace? Thx

## Odd results plotting a procedure with a varying pa...

I am getting such odd results from plotting a procedure that I call Q_opt1. When I plot the procedure at a specified set of points, the values produced and shown by plot look correct, i.e. my procedure Q_opt is *decreasing* in the parameter s.

This can be seen in the link below to the plot Q_opt1_Diagnostic1, in which I plotted the following:

>plot([Q_opt(0.4,0.01,0.5),Q_opt(0.3,0.01,0.5),Q_opt(0.2,0.01,0.5),Q_opt(0.1,0.01,0.5)],s=0..0.5,legend=["Actual value s=0.4","Actual value s=0.3","Actual value s=0.2","Actual value s=0.1"]);

HOWEVER, when I plot the procedure with s as the input variable in plot, i.e.

## How do I get maple to output the results in the ce...

I am using a maple document to solve some equations. All of the results are displayed centered on the page, except one. This result is all the way on the left side. Does anyone know why? http://www.mapleprimes.com/viewfile/1828'>View file details When I uploaded the file it is in the center! Why is the last result on the left in my screen?