I was curious about what people put in their maple.ini files. For example, here is mine. interface(verboseproc=2): kernelopts(assertlevel=2): kernelopts(gcfreq=10000000): Testzero:= proc(O) evalb(simplify(O)=0) end proc: _Envsignum0:= 0: DataSummary:= (Statistics:-DataSummary)@(x->`if`(type(x, 'Array'), x, Array(x))): Would anyone have comments on this? What code do others use?

I installed Maple 11 on Vista Business 32bit version. I couldn't even save or load worksheet files!!! Does anybody get the same problem as I ? Thanks.

I know I have done this before, but I'm not having any luck today. I am using Maple 10. I want to check if a user-entered function is positive for values in a bounded or unbounded interval. I do not want to do too much that is fancy, just functions that are likely to show up in the integral test for convergence of a series. Specific question: How can I get Maple to report that 1/sqrt(k) is decreasing for all k>1? I have tried working with both sqrt and surd, and with various assumptions. But, nothing gives a useful result.

f := 1/sqrt(k);       # no information
solve( diff(f,k)

Hi, I have a task and I haven't found a good way to work with it. I need to solve cubic functions like this a*x^3+b*x^2+c*x+d=0, where a,b,c,d are calculated from other data by excel, thus can be changed if I changed other parameters. So I have to solve every cubic function defined by these {a,b,c,d} data. And the nature of the experiment need only positive rational root. First I tried to use maple addin for excel. The problem is, it seemed that maple addin doesn't support multiple parameters for expression. For example, it's ok to use =maple("&1*2",A1), but I can't use =maple("solve(&1*x^3+&2*x^2+&3*x+&4,x)",A2:D2). Is it possible to calculate an expression from multiple cell data?

I want to define a sequence of Vectors,for example ,n Vectors just as a1,a2,a3..an.How to do? Thanks!

restart
assume(c, 'real')
solve(272*c^3-213*c^2+52*c-4 > 0, c)
but i get the result:

why not the desired result?

{c < -(1/1632)*(101709+(3264*I)*sqrt(1407))^(1/3)-979/(544*(101709+(3264*I)*sqrt(1407))^(1/3))+71/272-(1/2*I)*sqrt(3)*((1/816)*(101709+(3264*I)*sqrt(1407))^(1/3)-979/(272*(101709+(3264*I)*sqrt(1407))^(1/3))), -(1/1632)*(101709+(3264*I)*sqrt(1407))^(1/3)-979/(544*(101709+(3264*I)*sqrt(1407))^(1/3))+71/272+(1/2*I)*sqrt(3)*((1/816)*(101709+(3264*I)*sqrt(1407))^(1/3)-979/(272*(101709+(3264*I)*sqrt(1407))^(1/3))) < c}, {(1/816)*(101709+(3264*I)*sqrt(1407))^(1/3)+979/(272*(101709

I can write evalhf(sin(.25)) and get an answer with more precision than simply writing evalf(sin(x)). When I create a loop and time it I see that evalhf is much faster. Unfortunately, I can't seem to take advantage of this when doing numeric integration. e. g. evalhf(int(sin(x),x=0..4)) doesn't work. Some numeric integration problems are very slow and it would be nice to speed them up with hardware evaluation. Any way to do this? -thanks

i wanna know about how can i build programmning in random generator cases.i'm new in this programmning field with no experience. i've to build programmning in random generator which the data is distributed randomly.can you help me?

I keep running into trouble where I try to evaluate a seemingly reasonable integral numerically and Maple (9.5) runs arbitrarily long before I have to give up on it. Sometimes tweaking the expression to simplify it fixes the problem and produces an answer promptly, sometimes it doesn't. How do I troubleshoot such a thing? It's very frustrating not being able to get an result and not knowing why. My current example is this: (often they're simpler!) evalf(int(int(log(1 + 1/((x-4)^2 + y^2)^(3/2) / (10^(-6.5) + 1/((x-4)^2+y^2)^(3/2))), y=-50..-1), x=-50..50)); Any thoughts? Thanks! --Micah

Did anyone here attend the 2006 Maple Conference ? If so, is anyone willing to share some of the papers from the collected proceedings ? I would just like to see what new exciting developments were created from the global Maple community. v/r,

Again I'm going through chapter 4 of David J. Griffiths, Introduction to Quantum Mechanics, on the section dealing with the spherical bessel functions. Can someone look at my try at a personal creation of a procedure for the spherical bessel functions and tell whether it is correct and also recommend any critiques / improvements ? the user defined procedure is called n[l]. I'm also having trouble zooming in on the plots of the spherical bessel functions created using my procedure. can anyone also help with this problem ? thanks a lot. v/r, Here is the worksheet. View 285_quantmechchapter4sphericalbessel.mw on MapleNet or Download 285_quantmechchapter4sphericalbessel.mw
View file details

I wrote a procedure that should generate a series of functions. Now I would like to integrate over the sum of a specific series of the functions. Unfortunately I can't get Maple to evaluate the last integration command even though I can plot the sum of the functions. >iLk_waveform_func:=proc(Ue,Ua,Ia,L,T,t,n,k) > local liL; > # n := number of phase > # k := index of iLk > if not (t::numeric and n::numeric and k::numeric) then > return 'procname'(args) > end if; > > > if (t

i create an availability function for my markov model in which use constraits like 2 maintenance tresholds and some maintenance duration, mean time between failures. i want to determine the mean time between inspections value which max. the availability and plot its graph... should i have to give exact numerical values or is there any other ways to solve it..

I am trying to display some points on the same graph as a function. I first create 2 variables, P1:=plot(func(x),x=6..8):P2:=plots[pointplot](Data) where Data is a 10 x 2 Matrix. None of the x-values in DATA is less than 6 Problem is, when I execute plots[display]({P1,P2}) the plot produced ignores the range command in P1. It starts at x=0. Placing the range command directly in plots[display]({P1,P2}) generates an error, as does placing the range command in P2:=plots[pointplot](Data) Evidently plots[pointplot] does not accept a range command, and insists on starting at x=0. Is there any way around this?

I have a piecewise defined function iL1. Now I would like to define a function iL2 = ( iL1(t+2/3*T) for 0 <= t <= 1/3*T iL1(t-1/3*T) for 1/3*T < t <= T ) How can I do this in Maple? How can I change the boundaries in a piecewise defined function in order to be able to perform a time shift? The following linked worksheet shows the definition for iL1 and what I would like to achieve. Download 305_test_piecewise_timeshift.mws