I tried Joe's suggestion about using the layout palette in a document, pressed enter and the desired subscripted symbol duly appeared as output. Next I entered is(%=t[0]) and Maple duly replied "false". So I copied the output of the subscripted symbol and pasted it into a standard worksheet (1D Maple input) and entered is(%=t[0]) and Maple answered "true". So even if one can enter a subscripted (subliteralled?) symbol in document mode, it's not transferable. There may be similar problems with other "nifty" symbols. It looks as though there could be more pain and grief for Maple on this presentation quality road. Is it worth it? All the same, nice one Joe. J. Tarr

The root problem is that we all got used to reading books with subscripted symbols and writing them ourselves. Maple can't do that simply because it has other uses for subscripts. So what should we do? Insist that Maplesoft re-writes Maple so that we can subscript away to our hearts' content? Or, should we do the pragmatic thing as Axel suggests? Personally, I vote for Axel. J. Tarr

In Maple there are often several different ways of doing something. Here's a way that does what you want. Observe that for s=0, EBO[0,1], EBO[0,2] = 1 , 4 So do this: restart: p[1] := 1; p[2] := 4; EBO:='EBO': EBO:=Matrix(1..10,1..2): for n from 1 to 2 do for s from 1 to 10 do EBO[s, n] := sum((x-s)*p[n]^x*evalf(exp(-p[n]))/factorial(x), x = s+1 .. infinity); od od: interface(rtablesize=11); EBO := <<1|4>,>; Hope this helps, J. Tarr

Maple needs to know the size of the Array that you want, so N must be specified. Do that and your problem goes away. Really, you should be using the newer version Array, but the old version still works. Hope this helps, J. Tarr

Please upload your worksheet with the 3D pointplot and the data, or a reasonable sample of it, if there's too much for Maplenet. (Click on "Upload/Use File or Worksheet" just above the Comment box.) Most of us here are not biologists, so please suggest, if possible, a suitable function for smoothing the data. My guess is that your data can be represented by a logistic function with several several independent variables. There are a few examples of similar fitting problems over at the Application Center. J. Tarr

Please see the example at the bottom of the help page at ?odeplot and some of the examples above that one about plotting multiple curves. Hope this helps, J. Tarr

George, It's not just Maple. There are quite a few programs that don't yet work properly with Vista. Take a look at some of the Computer mags, or do a quick Google to get a feel for it. The general advice is wait. Good luck, J. Tarr

You may get some inspiration from the help pages at piecewise,dsolve. Hope this helps, J. Tarr

Have you got the User Manual supplied with Maple 11? That's a good start. Otherwise, this is a good intro to Maple and you'll find hundreds of books here. Hope this helps, J. Tarr

Have you had a look at the Finance section at the Application Center? This application might be a useful start. Good luck, J. Tarr

Excel's Normsdist function is the cumulative density function of the Normal distribution. In Maple please see ?Statistics[Distributions][Normal]. Hope this helps, J. Tarr

Praveen, Rather belatedly, it occurred to me that instead of d/dy in your matrix, you might be able to use the laplace operator - subject to all the usual restrictions. Hope this helps, J. Tarr

Sorry, I misunderstood your question. AFAIK it is not possible to write differential operators into a matrix and then perform linear algebra operations with Maple. You might be able to do something on the lines I suggested above without the substitutions, but you will have to think carefully what the results actually mean. For the record, the substitutions line above should have read: eqs := subs({d/dy*w(y)=diff(w(y),y),d/dy*v(y)=diff(v(y),y)},eqs); Good luck, J. Tarr

Your equation C.V = 0 multiplies u(y), v(y) and w(y) by d/dy, which is not the same as d((u(y))/dy, etc. So you need to substitute the proper differential operation for the product produced by your equation. Assuming that U means U(y), you could try something like this: restart; C := Matrix(3,3,[ [rho*(alpha*I+omega*U(y)*I), rho*diff(U(y),y), alpha*I],[0, rho*(alpha*I+omega*U(y)*I), d/dy],[alpha*I, d/dy, M^2*(alpha*I+omega*U(y)*I)]]); V := ; eqs := C.V = 0; subs({d*w(y)=diff(u(y),y),d*v(y)/dy=diff(v(y),y)},lhs(eqs)); eqs; ODEs := seq(lhs(eqs)[i]=0,i=1..3); Then dsolve the three equations. I believe that you might be able to use DEtools[matrixDE] if you constructed the matrix suitably, but I have not tried it. Hope this helps, J. Tarr

You could do something like this: restart; libname := "C:\\MyDocs\\MyMaple\\Mylib" , libname; with(Mylib); Mylib[epsilon/print](...); That would allow you to use the procedure, provided that you know what to insert in (...) above. If you want to know what the procedure looks like, you could do showstat(Mylib[epsilon/print]); Hope this helps, J. Tarr