Hello, When i used command 'Eigenvector' to find eigenvalues and eigenvectors of mechanic system like this : (wfem,modvecs) := Eigenvectors(mm,kk); # mm,kk are mass and stiffness matrices of system . It returns a complex vector and matrix. But when use : (modvecs,wfe):=Matlab[eig](mm,kk,eigenvectors=true); It returns a float matrix and vector, i try using Matlab to solve and it also retrurns a result similar to Matlab[eig]. The important thing is two results of two command 'Eigenvector' and Matlab[eig] are difference. After that, I use 'Map' command to take real part of result(in 'Eigenvector'),but it works only with 'map' ,and 'Map' doesn`t.

Goodday, Ladies and Gents, My Prof. has asked us to prepare text files containing pi, e, sqrt(2) and the golden mean to 100,000 places for class next week. Easy enough ((evalf[200])(sqrt(2)),(evalf[200])(exp(1)),evalf[200](Pi) - excepting for golden mean. Is there a quick way to do it? Thanks. Evyn

Dear all, I have query with 9X9 matrix of MAss and Stifffness ; So please kindly help me how to solve it. Thx,Rgds PNChary

The episode is called Surviving Math education and the guest is Jack Weiner, author of the book, and e-book the Mathematics Survival Kit.

While trying to install Maple 10(Single User), after the initial install everywhere finishes, during the screen with the Maple 10 Spash I get an "This Application has Unexpectedly Quit" Invocation of this Java Application has caused an InvocationTargetException. This application will now exit. (LAX) Details are: java.lang.NullPointerException at ZeroGga.a(DashoA8113) at ZeroGga.a(DashoA8113) at ZeroGfs.a(DashoA8113) at com.zerog.ia.installer.AAMgr.a(DashoA8113) at com.zerog.ia.installer.Main.d(DashoA8113) at com.zerog.ia.installer.Main.a(DashoA8113) at com.zerog.ia.installer.Main.main(DashoA8113)

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I wonder why the "asympt" doesn't expand the BesselI right!! Is there another way to exapnd it without using "asympt"

Boston publishing company is seeking reviewers for the technical evaluation of Maple 10 algorithms. These algorithms will serve as interactive math tutorials for a premiere college-level student Web site. Experience using Maple, Mathematica or MathCAD is required. A strong mathematics background is preferred. All work will be completed online using a PC. The term of the contract is approximately 15 hours per week for 6 months.

I have been using solve in Maple 9.5 to solve a system of equations with a very large solution (90,000 terms provided in about 10 mins). Access to Maple 9.5 was unvailable so I used Maple 9; I gave up waiting after several hours and seeing memory use go up to 1Gb. Is there a big difference in the coding to explain this. Also, I don't yet have Maple 10; does it have any further improvements?

One of the good things about Maple 10 is if I type > f_max:=10; then max is written as a subscript of f; and the variable f_sub_max is asssigned the value 10. However, there is problem with this syntax. One assigned > f_max:=10; I can not use f as a variable name. Is there any solution to the problem? I like the varaible names with subscripts rather than underscore.

If you have been coming to MaplePrimes for a while you may notice something slightly different about the site. The change is subtle, but it is there. The URL for the site is now www.mapleprimes.com. You don't need to change anything though, your bookmarks will continue to work, beta.mapleprimes.com has been changed to forward to the new URL. If you are a Maplesoft EMP customer looking for the contents of the old mapleprimes.com, please see the Maplesoft EMP information page. The site is still in Beta, as we are still working on a number of major changes to the site.

I am a graduate student in Amir kabir University in Iran, I am in desprate need of help, My problem is I have a 4D lie algebra,and a metric tensor onfilteredo calculate Ricci tensor & some other things,in maple,or where ever it could be done. PLEASE HELP Me. Sencerely, Fatemeh

I make som calculations in Maple and I get an output like: diff(y(t),t) = y(t) + u(t) Later I export this to Latex but I'd prefer the shorter notaion with "dots" on the time derivative, i.e. y_dot(t) = y(t) + u(t) Is there a way to get maple to output this?

When doing an implicit plot recently, I ended up with a whole large triangle which was completely tessellated with much smaller triangles. The checking of other graphs and numerical data of the function in this region, it was very clear that the implicit function should be a well defined line in this region. Further look at the code for implicitplot() indicated that, after some setup work, it ultimately called exactly the same routine (`plot/iplot2d`()) as plots[contourplot]() with the option "contours=[0]" to do the actual calculations. I then discovered that when I called contourplot() directly with the "contours=[0]" option I got a correct implicit curve consistent with my other data and with no tessellations.

As currently programmed, fsolve() does not do numerical derivatives for systems of equations. The reason for this is that subs() is used instead of eval() when evaluating derivatives. [Note: jacob is the symbolically defined jacobian of the system of equations and lsub is the sequence of appropriate numerical substitutions (not the "list" of substitutions the mnemonic might suggest).] The original statement (in `fsolve/sysnewton`) is: A:=traperror(evalf(subs(lsub,jacob),Digits-5+n)); The functions evalf() and subs() apparently do no know how to work together to produce numerical derivatives. However, the following statement does work.