Hi, I am trying to solve a time dependent partial differential equation using pdsolve in maple 11, but when I try to plot the solution I get the following error message: Error, (in pdsolve/numeric/plot) unable to compute solution for t>.200000000000000011: unable to store Float(undefined)+Float(undefined)*I when datatype=float[8] I am new to Maple and I don't know what that error message really means. Can someone please help me? Thanks

how to forcely or better say conditionally stop a "for" loop at a specific reached value without completing the rest of the loop, in other words I have such loop : for i from 0 to 100 do x[i+1]=f(x[i]) end do , I want this loop to stop at i where x[i+1]=x[i] (the fixed point) this can be at i=40 (for example) then I dont need to complete the iteration until i=100, which means how to let maple determine the number of iterations needed. and I need : if x[i+1]=x[i] k:= i: g:=x[i] to use these valuse later on in the program. if I somehow can stop the loop at i where x[i+1]=x[i] then I will absolutely not need the if statement. Can you please tell me how to perform this task?

can anyone solve me this problem in maple? i have a homework for tuesday i have to make a graph for a laplace function: 1/sqrt(2*Pi)*Int( e^(-x^2/2),x=0..x; can anyone help me??? please!

Hello all. I am working with simple algebraic expressions with numerous assumptions on the various constants that appear. One such expression, an entry of a matrix, is > M[1,1]; 2 (beta~ h0~ + h0~^4 - beta~ h0~ - 3 h0~^2 + 2) h0~ ----------------------------------------------- h0~^4 - 3 h0~^2 + 2 Note that the beta h0 terms do not cancel. > simplify(%,symbolic); 2 (beta~ h0~ + h0~^4 - beta~ h0~ - 3 h0~^2 + 2) h0~

A,B,C,D,E,F are known numerical values I want to find x and y such that Signum (-x+A).B +(y+C).D = -1 AND x.E-y.F=G AND |G| minimised I think I can see how to write a routine to do this. However, do any of the commands do this? All help much appreciated.

Hi, i am trying to use assign in this seemingly simple situation output=op restart: s:=k[1][1]*x[1]+k[2][2]*x[1]; op k[1][1] x[1] + k[2][2] x[1] s1:=k[1][1]*x[1]+k[1][2]*x[2]; op k[1][1] x[1] + k[1][2] x[2] l:=solve({coeff(s,x[1])=coeff(s1,x[1])},{k[1][1],k[2][2],k[1][2],k[2][1]}); op {k[2][2] = 0, k[1][1] = k[1][1], k[1][2] = k[1][2], k[2][1] = k[2][1]} p:=solve({coeff(s,x[2])=coeff(s1,x[2]),k[1][2]=0},{k[1][2],k[2][2],k[1][1],k[2][1]}); [] {k[1][1] = k[1][1], k[2][1] = k[2][1], k[1][2] = 0, k[2][2] = k[2][2]} assign(p); Error, (in assign/internal) invalid left hand side of table reference

Hi, i have been fighting with Maple 11 for a long time and i would like to know if i am doing something wrong or the integral is so complex for the program... I really need to solve this problem soon if i would like to have a successfully Master Thesis :) During the degree i study Maple but i forgot a lot :( Here is the issue: I am working in telecommunication issues and calculating the output power i get this integral: P[through] := int(2.000000000*10^8*(.51-1.428285686*10^(-0.1600000000e-1*Pi)*sqrt(1-k[2]^2)*cos(0.2473600e-2*Pi^2/lambda)+(10^(-0.1600000000e-1*Pi))^2*(1-k[2]^2))/((1-.7141428429*10^(-0.1600000000e-1*Pi)*sqrt(1-k[2]^2))^2*(1+2.856571372*10^(-0.1600000000e-1*Pi)*sqrt(1-k[2]^2)*sin(0.1236800e-2*Pi^2/lambda)^2/(1-.7141428429*10^(-0.1600000000e-1*Pi)*sqrt(1-k[2]^2))^2)), lambda = 6.30*10^(-7) .. 6.35*10^(-7))

For some work I am doing with matrices with polynomial entries in certain parameters, I need to know for which values of the parameters there is a possibility that the rank of the matrix drops down. I tried using fraction free Gaussian elimination in both linalg and LinearAlgebra. The two methods do not always give the same resulting matrix. Moreover, the matrix is not as simple as it should be. I understand that a Gauss-Bareiss algorithm produces a result which I would be happier with. Does anyone know of such an implementation for Maple? I have been having some difficulty finding an explicit form for the algorithm on the net.

i have a laplace function. this function contains a integral. how can i use maple to find the fisth 10 terms of a maclaurin series. please, i really need help

using maple find out the sum of the follwing series: sum(n=1,infinity) 1/n^2; sum(n=1,infinity) (-1)^n+1/n^2; sum(n=1,infinity) 1/(2n-1)^2;

There's a discussion on generating cross-correlated sequences( http://www.mapleprimes.com/forum/generate-correlated-random-numbers), but how do I create a sequence of correlated random variables from an arbitrary distribution? How do I test a given time series (list,vector) for a possible autocorrelation (serial dependence) with maple? Thanks.

why when men talk about graphing newton's basins of attraction they always give complex exaples . For the real polynomials we have the same idea for example the polynomial : f(x) = x^3 + 2*x^2 - x -2 this has 3 real roots 1, -1, -2 and of course we have some intial x0 makes newton formula converge and other not so we will have basins. or for x^3 - 1 which has 3 mix of real and complex roots. Can you please help me in writing a maple program that create the graph of newton's basin for such real polynomials? and If you think that my idea is not correct can you please provide me with a maple program that create the basins for a complex polynomial so that I maybe can modify it for the real ones?.

hi let's say i want to plot sin(x) in excel i know that in excel i should type =Maple("plot(sin(x),x") now how to do that within vba i have already included the reference of maple within vba thank you

f(x)=x^2 expand in fourier series: a)by cosinuses on (0,pi) b)by sinuses on (0,pi) c)on (0,2pi)

Hi let's say i have a list like this one u:=[1,2,5] i want to know the max that is 5 in this case how to do that thank you