Any help with this question will be much appreciated. I have a set with 15 elements and i have broke them down into all the possible subsets using the powerset function. I have also assigned the elements to a vector. I want to sum all the elements of each subset. ie The set {a,b,c,d} has all the subsets {{},{a},{b},{c},{a,b},{a,c},{b,c},{a,b,c}} with these assignments let us say a:=[1,0,0], b:=[0,1,0], c:=[0,0,1] I want results such that i have a, [1,0,0] b, [0,1,0] c, [0,0,1] a+b, [1,1,0] a+c, [1,0,1] b+c, [0,1,1] a+b+c, [1,1,1] Is there any way to write a Maple function to carry this out?

Please help with these additional questions. (1) The covariant components of a second order tensor with respect to the basis e[1]=i[1]+i[2], e[2]=i[2]+i[3],e[3]=i[1]+i[3] are given by (a[ij]) = array([[2,0,1],[-1,2,0],[0,2,-1]]) Find the components a^ij, a[i]^k, a[k]^i

Hi, I was wondering if there is a way to define GF variables in Maple. If I am working in GF(2^7) for example with a specific irreducible polynomial, how do I find the result of (y-2)*(y-4)*(y-8)*(y-16) in the same field, where y is a variable of this field and all the numbers 2, 4, 8, and 16 represent polynomials (for ex: 4 = 0000100)? Is there a way to define a GF variable in maple? I couldn't find it under the existing GF package and I don't want to do the multiplications one by one, if there is a way to avoid it? Thanks, Kahraman

I had a few questions that I need help with: 1) I'm trying to write a procedure to solve a system of equations. To be specific, we are given 2 n x n matrices, say A and B by the user. We have two generic vectors in R^n, write them as x = [x1, x2, ..., xn] and y = [y1, y2, .., yn]. I want to solve for each of the yi's in terms of x'js for the equation A.x = B.y - how would I go about doing this? 2) So I get some answer to 1), say something like y = [x1-x3, x1+x2-x4, x1+x2, x3+x4] (n=4 for ease) . How could I easily take the coefficient matrix of the transpose of this vector? So, my final matrix would look like:

I know the general idea of the Sierpenski's Carpet I was just wondering if there was a way to make Maple produce this plot? any help would be greatly appreciated

I have two questions: 1. How do I solve the following? 4sin^2 x + 2cos^2 x = 3 ~also~ 2. How can I find the exact value of the following when Sinu= 3/5: sin(u/2), cos(u/2), and tan(u/2)

Hello! I made a maplet with the MapletBuilder for displaying a worldmap or - if requested - a globe with locations of earthquakes in a selected period of time. Before that I programmed a maple worksheet to this subject. The maplet is build like this: First there is a Plotter-Window followed by two Radiobuttons for choosing between two different graphic renditions (2D and 3D). For choosing a period of time I used DropDownBoxes. The starting date and finish date consist of 3 Boxes each to choose month, day and year separately. To confirm the dates and to plot the relevant map there's a ClickButton.

I want to solve for the intersecting curve between two surfaces. The figure demonstrates what I mean in a plot, I'm interested in the curve between the red and the blue areas. (The surfaces are seen from above.) Ideally, I would just ask Maple to 'solve(surface1>surface2)', where the surfaces would depend on some parameters. This do, however, not work. (The functions (surfaces) has up to 7 input parameters, and combines heavyside functions and the max function.) I'm sure there is a way, though. Given my ignorance, I'm now pursuing to 'estimate' the curve, by somehow reading off the intersection numerically and using some regression or whatever. Any idea how to do this efficiently?

if you think you can help me out... let me know.. im in calc 1 and i have lots of questions and some stuff i wanna make sure i got right! id really super duper appreciate it! :) sascha!

hello, i have some problems with maple. i need to know an inflexionpoint of the following function: f:= x->((x^3-x+1+(6/30))/(x^2-1)); i derivate till f'''(x) with the following commands dv1: D(f)(x); dv2: (D@@2)(f)(x); dv3: (D@@3)(f)(x); and here starts my problems. maple seems to do nothing. for dervation f'(x) and f''(x) it shows me nothing for derivation f'''(x) just a 0. i suppose the mistake is in front of the computer :O. so what is wrong? here my exact commands: restart; f:= x->((x^3-x+1+(6/30))/(x^2-1)); df1:= D(f)(x): df2:= (D@@2)(f)(x): df3:= (D@@3)(f)(x):

Hi I have constructed a do loop to represent an epidemic described by 3 equations. I have plotted these using the initial conditions given. If i want to identify the values of S[k], I[k] and R[k] at k=60 how do i enter this? And how do i find out the exact point where the epidemic reaches its peak?

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I had the worst physic's teacher in High School so we did not learn a single thing. If you guys could help me I'd appreciate! I need to find the angle if A throws a rock at C. He throws his rock at 20m/s. C is on a 8metres building. A is 10metres away from C. With which angle (theta) A needs to throw his rock to hit C. Situation: http://img522.imageshack.us/my.php?image=problemkk3.jpg Equation: http://img519.imageshack.us/my.php?image=physicequationpa1.jpg

Hi, I'am trying to solve a nonlinear (spring) ODE like: > ode := A*(diff(x(t), t, t)) + B*(diff(x(t), t)) + R(x(t)) = 1; ...So, I defined a nonlinear (elastic-plastic) resistance function R(x(t)): > xLast := 0; RLast := 0; Rmax := 1; > R := proc (x) > local RR, dx; > global xLast, RLast, Rmax, K; > dx := x-xLast; > RR := RLast+K*dx; > if Rmax <> elif RR <> end if; > xLast := x; RLast := RR; > return RR; > end proc; ...Set up the ODE: > xLast := 0; RLast := 0; > ode := A*(diff(x(t), t, t))+B*(diff(x(t), t))+R(x(t)) = 1;

Is it possible to dislay two functions in different scales in the same diagram? E.g. one function taking values in the range 1..10 and another taking values in the range 0.01..0.1. The reason I want to do this, is to display functions (on different scales) which interact in the same diagram so they can be easily compared. I can, of course blow one function up, but I find that slightly dissatisfying, as the numbers loose their meaning, and understanding the plot becomes more difficult. If this is not possible, is there a way I can effectively export the ploted 'data' and redraw the graphs in another more suitable program? Any tips or help appreciated.