I would like to solve the following problem as stated below:

> ode3:=J=diff(E(x),x)*E(x)-diff((diff(E(x),x)),x);


> dsolve(ode3);



> odeplot(dsolve({ode3,D(E)(0)=2,D(E)(1)=2000},numeric,range=0..1),refine=1);

Error, (in dsolve/numeric/BVPSolve) initial Newton iteration is not converging

I have taken "J=2" doesn't matter too much for now. As you will see from the second command Maple can find an analytical solution to the problem. From my trials it seems that the initial condition D(E)(1)=2000 makes the problem, smaller values are ok. I have tried "Digits:=100" but this didn't help me. In the end it would be nice to go to larger (about 7 orders of magnitude) values for D(E)(1) in comparison to D(E)(0). Can you help me find a way to solve this problem?

Can anyone help me please?! Cash Reward! My program solves my implicit equation but i am having trouble getting more than one result, ie, varying one of the variables. The best i can do is make a loop which gives a table of results which requires individually copying the results across into Excel for anysort of graph. Ideally i want to be able to plot the results in Maple, for any variable. This is for my 3rd year engineering project, any help much appreciated. > restart; > with(LinearAlgebra): > # IMPACT OF A FLUID FILLED SPHERICAL SHELL ("NON-HERTZIAN") WITH A "HERTZIAN" BALL-

To anyone: Please provide the syntax on how to substitute without maple evaluating the expression. For example if I have an expression x^2+2x+5. I want to substitute to the expression x=2. I want simply to see 2^2+2*2+5 without Maple evaluating the result preferably in maplet form. Thanks PV

Does somebody want Maple to support symmetric elliptic integrals? These are the Legendre elliptic integrals defined in terms of symmetric elliptic integrals. ELLIPTICF:=proc(x,k) x*R_F(1-x^2,1-k^2*x^2,1) end proc: ELLIPTICE:=proc(x,k) ELLIPTICF(x,k)-k^2*x^3/3*R_D(1-x^2,1-k^2*x^2,1) end proc: ELLIPTICPI:=proc(x,n,k) ELLIPTICF(x,k)+n*x^3/3*R_J(1-x^2,1-k^2*x^2,1,1-n*x^2) end proc: ELLIPTICK:=proc(k) R_F(0,1-k^2,1) end proc: ELLIPTICEK:=proc(k) ELLIPTICK(k)-k^2/3*R_D(0,1-k^2,1) end proc: ELLIPTICPIK:=proc(n,k) ELLIPTICK(k)+n/3*R_J(0,1-k^2,1,1-n) end proc: Jim FitzSimons

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.