Hello.

Can anybody explain me please this error? Thanx :-)

Error, cannot determine if this expression is true or false:

-2.500000000*exp(0.) <= -1.675000000


Program:

> restart:
> with(linalg):
> with(plots):
> with(DEtools):
> with(inttrans):
# Warning, the protected names norm and trace have been redefined and
# unprotected
# Warning, the name changecoords has been redefined
# Warning, the previous binding of the name adjoint has been removed
# and it now has an assigned value
# Warning, the previous binding of the name hilbert has been removed
# and it now has an assigned value

Private messages allow the use of markup tags. However, the only action is "submit"; I cannot preview the message to ensure that my inserted markup is correct.

Here's a frustrating problem I've been having with "assume".
You'll see below that I assume that v'(m) >0 and v''(m) <>
Maple clearly remembers that v'(m) > 0 (as seen in the assumptions list and by looking at the first "is" in (4)), however, it now can't figure out that v'(m) > 0 implies !(v'(m) <>
Strangely, this worked perfectly fine before the additional assumption was added, and looking up the property (6) reveals the correct answer.
Moreover, maple seems to have two sets of assumptions on v'(m) (for six total assumptions, when I would expect four).

Any maple geniuses have an idea as to why Maple's "is" function is confused?

Currently Maple doesn't offer any vector graphics export besides the slightly flaky postscript. I almost don't care whether it is pdf, svg, or for most windows users probably most preferable wmf. Please, get some into the next version. It may be the one reason why I hardly ever see Maple plots in a Powerpoint presentation. The bitmaps just look downright ugly, unless you blow up the resolution. Gregor

Implement a computer program which, for a given lower triangular matrix A with the diagonal entries different from zero,finds the matrix inverse to A by solving the equations Axj= ej for j=1,...,n by the " forward substitution"

Implement a compter program which decides whether a given matrix A e Mn is symmetric positive definite.

Implement a computer program which, for a band matrix A eMn with p=3=q such that the non zero elements ofA appear in the main diagonal and in the diagonals on the boundary of the band only,for a vector b e Rn and for w e(0,2), e>0 given, approximates the solution of the system Ax=b by the relaxation with accuracy e.

The feature which allows users to copy and paste the equations from Differentiation or Integration Tutor is disabled after i install Maple 10.03 update This feature is useful for lecturers as well as students. I wonder could Maplesoft enable this feature in the coming update. Thank you.

Could anyone please suggest how to data cluster analysis? I have a large set of multi-dimensional data (300 children prefer 2-3g of sugar in their breakfast cereal, whereas only 100 prefer 1-2g, etc) and I want to break the data up into blocks that minimize the number of different types of cereal I should create, while capturing the maximum amount of the market. I expect there is some least-squares way of doing this, can anyone suggest a concrete example of how to this in Maple10? Thanx

I remember, that similar bug was in the 10.0. Now I found it in 10.03. How to reproduce it: 1) Create new worksheet 2) Enter and execute next statements (using ctrl-L to enter referencies to formulas): >exp(-y^3/x)*y/x^(4/3); ... (1) >1-a*x; ... (2) >assume(y,positive); >inttrans[laplace]((1),x,s); ... (3) >inttrans[laplace]((2),x,s); ... (4) >inttrans[invlaplace]((3)*(4),s,x) ... (5) >plot(subs(x=1,a=1,inttrans[invlaplace]((3)*(4),s,x)),y=0..3)

I have a maplet application stored in a single file, one of them a frontend. This single file is too long and very combersome to maintain. The frontend maplet has buttons that goes to a proc that displays another maplet depending on what button is pressed. Will someone tell me if it is possible to break down this single file into several files with one maplet each file so that when a button is pressed sysem goes to that file. If this is possible, please provide the maplet syntax. I tried ...function=c:\\..etc but does not work. Also when my application is broken into several files, how does it affect the exportation of this application with several files.

Consider the following three problems: 1) given a list [a,b,c,d,e], return the list [a=1,b=2,c=3,d=4,e=5] 2) given a nested list [a, [b, [c, [d, [e]]]]] return the list [a,b,c,d,e] 3) given an integer in base 10, compute it's base b representation First I will show you what not to do:

L := [a,b,c,d,e];
M := [];
for i from 1 to nops(L) do
  M := [op(M), L[i]=i];
end do;

Building up lists (and sets) incrementally is quadratic time, because each iteration of the loop allocates linear storage to hold the new list. The standard solution is a loop with a temporary variable, assigning to a table:

I am new to Maple and I am looking for these examples and am having trouble. Could someone lead me in the right direction or tell me which Maple books to purchase? example: precalculus or calculus or one of the new user guide books. I can't seem to find much on "The Square Root Property" and factoring or Solvng Equations by completing the Square, Quadratic Formula and Discriminant. I know I basically need to just play with the applications but know there must be information somewhere.

I was just wondering if anyone has taken the time to start on a wiki for maple. I have seen many other small wikis that work quite well for programming languages and environments, and feel that one for maple would be a great benefit for the community. If there is one, would someone please kindly point me towards it. If there is not one, is there anyone who'd be interested in starting one?

It seems like the Beta distribution in the Statistics package doesn't work properly when trying to define a particular Beta distribution since Beta(a,b) also refers to a integral when a and b are fixed numbers. Has anyone else encountered this problem? Is there a way to get around this problem other than to define your own Beta pdf? Jim