I use Maple-11 , especially the Physics and Tensor, Diff Geometry packages, in a worksheet. How do I get to create tensors with a uniform notation for covariant and contravarint indices using Create or Define ? I need tensors like, for instance, A superscript i, subscript j, as in McCONNELL (Abs. Diff Calculus) How do we get a uniform notation for tensors on a worksheet using either the Physics or Diff Geom package ? Are Create and Define equivalent ? Can thye be made to print tensors with the same format, or appearance? Please give me a few examples. Thanks. Radhakrishna Prof Physics

I have get a functionsystem:

I apologize to ask this rather simplistic question, but I am very new to this. I can plot a function such as plot(10*x3, x=1..5); BUT what if the range is only specific points such as x=1, 0,07, 8? What is the syntax for this range?

I'm trying to swap rows of a matrix using the LinearAlgebra package not the linalg one. is there a easy way of doing this?

The special linear group SL(2)consists of all 2 x 2 matrices (with complex elements) having a determinant of +1. Show that such matrices form a group. Note. The SL(2) group can be related to the full Lorentz group in Section 4.4, much as the SU(2) group is related to SO(3). Arfken, and Weber. v/r, thanks,

well, i'm using a Evalution Version Maple .i spend one day time to find how can i change Maple to Document Mode but finally failed. May be Evalution Version doesn't have Work Mode and only have Document Mode? :(

I have a list of lists. The number of lists I have is unknown (though always a positive integer) and the number of elements in each list is unknown (though, again, always a positive integer). Some examples: [[2],[3]]; [[4],[4],[5,1]]; [[3,4,1],[2],[2],[6,7]]; I'd like to form a list of all possible sums formed from one element of each list. The lists of sums from the examples above would be [6]; [13,9]; [13,14,11,14,15,12]; The order doesn't matter, and repeated elements don't matter. I can form these lists when I can control the number of lists in the large list and write an explicit nest of for loops. I figure there's got to be a more elegant and powerful way of producing these sums.

Hi I've got 2 functions of a variable T [x(T) and z(T)] and a varying parameter u and i want to plot x(T) and z(T) against each other and show how the curve changes as u varies (hope that makes sense) how can i do that?

(I think this was posted in the wrong section of mapleprimes.) Hi, I have read the manual on saving to a file many times but it never works for me. I am using Maple 10 on a Mac running MacOS 10.4.10. I have copied the example from the manual and run that and it does work so I am quite confused. Here is what I would like to do: I have a worksheet with lots of definitions,equations, lists, etc. and I would like to have these available on another worksheet. I have tried > save nx; # nx is the name of my worksheet then > read nx; Error, unable to read `nx` I have the same problem with trying to save names e.g.

For the following function determine the x coordinates of the local minimum and the local maximum f(x)=9x+21/(x-13)

Hello. I'm having a problem graphing the following parametric equations in 3d , together: x=1-2*t y=-t z=3+t and x= 5+3*s-4*t y=7-5*s-5*t z=-2-s+6*t Thanks, excuse-me my English, I’m foreigner

Hallo, I have a function in form f(x(t)), how can i define it in maple and diff it? thanks a lot ex ante.

Hi, Thanks to a few matrix-transformaties, I have elements like ' 1/2*cos(t)-1/2*3^(1/2)*sin(t) ' which also equals cos(t+1/3*pi) (--> thx to: cos(pi/3) = 1/2 and sin(pi/3) = sqrt(3)/2). But I don't find any way to make maple realize that it can be simplified that way. Can he make such simplifications? thx in advance

How do I use newtons method tutor to find the fixed points of a function?

Ok, I'm writing a procedure that will return either true or false as to whether a given coordinate (u,v) lies with the plane polygon, made up of n sets of points (xi,yi). I can write the loop code (I think) to check whether u and v are within the intervals; what i cannot do is define the matrix properly that representsteh points. I think it should look like: A:=linalg[det](linalg[Matrix](3,3,[X,Y,1,x[1],y[1],1,x[2],y[2],1])) Obviously this is for a 3x3; I want to replace the x[1], y[1] with i's; however, no matter which way i do this i get an error message saying that i have invalid parameters for a matrix.