## Help on a plot problem, plot symbol, subscript...

Hi, I need some help on plot and I am still new. Hope someone can take care of my questions, thanks first! I want to plot a figure. And I want to the x-axis label shows \phi_1; and y-axis label shows \Pi. I want to show them with the subscripts "1 and t" And I want to show the figure title as "V_L=20, \gamma=1". Can maple do this? Thanks a lot!

## subsitution of a variable with a certain power in ...

Hi Everyone, I am trying to make a special substitution which neither  subs  nor  algsubs  seem to be able to make. I have long polynomials (maybe with 3000 terms), but for the sake of clarity here is an example with a short one: Poly:=a^3+a*a^2+a+a*a; Now I would like to substitute a by a^2, but only in the terms that have a (to the power of one). (It is important that the a^3 in the original Poly is not changed to a^6 ). So after substitution the polynomial should become: Poly:=a^3+a^2*a^2+a+a^2*a;

## displaying multiple plots...

why won't this display my graphs: g:=x->sin(Pi*x/6): h:=x->((7.4*10^22)/(3.84*10^8)^3)/((2*10^30)/(1.5*10^11)^3)*sin(4*Pi*x/(24+5/6)): A:=plot(g(x),x=0..24*7): B:=plot(h(x),x=0..24*7): display(A,B);

## Problem with localization of Maple 10 in Linux...

Hello everyone, I use Fedora Core 5 and Maple 10. When I try to open a file with comments in Russian in classic interface, instead of normal characteres I see strange symbols, in new java interface squares instead of characters. Moreover, cyrillic input doesn't work at all in the classic interface, and in the java interface it inputs only squares. Linux is fully localized, there are no problems with encoding in other applications. In WinXP there are no problems like that in Maple, but I have to use Linux. I can imagine that hardly someone of you had to face the problem, because the forum is in English, but nevertheless.....

## Plotting procedure output...

Hi, I was trying to plot a graph in Maplet using for this the output of a procedure. I don´t understand way the plotter element don´t show the procedure output. Can anyone help me? Thanks, João Laudares, Brazil Here is the code: > restart;with(linalg):with(stats[statplots]):with(plots):with(CurveFitting): > GSeidel:=proc(a, prec, nmax) > local n, xnew, i, j, k, m, erro, soma: > global xold,x,y,R2,R3,h,X,Y,vetor,xix,z,p,vetor_erro,vetor_iterada,R4,R5: > n:=rowdim(a): > xold:=vector(n,1): > xnew:=vector(n,1): > erro:=1: > vetor_erro:=vector(nmax); > vetor_erro:=0; > vetor_iterada:=vector(nmax);

## how to print a matrix...

I would like to know how to print a matrix using the TextBox command from Maplets, because always print a message "Matrix(3, 3, [ [ 1,1,1],[1,1,1],[1,1,1 ] ], datatype = anything, storage = rectangular, order = Fortran_order, shape = [])", for example. Another doubt is if it's possible to print text and equations using the MAthMLViewer without erasing the previous print in the Maplets (to each program output a line is added in the MathViewer). I would be grateful for any hint. Adriene Pfeifer restart:with(LinearAlgebra):with( Maplets[Elements] ): test:=proc() local M; M:=Matrix(3,3,1);

## labeling curve...

is there a way to add the level of the curve to the plot whan using contourplot? so that every curve will have it's "haight" attached?

## How to solve this problem with Maple...

I need help to solve this problem in maple. :) "Use as many columns of matrix A as possible to construct a matrix B, with the property that the equation Bx=0 has only the trivial solution. Solve Bx=0 to verify you work.." Martix A: A:=matrix([[8,-3,0,-7,2],[-9,4,5,11,-7],[6,-2,2,-4,4],[5,-1.7.0.10]]);

## Plotting during procedure execution...

I was using a procedure for linear systems solution (Gauss-Seidel) and in way to obtain information about the solution convergence I would like to obtain a graph during the procedure execution by Maple that may be ploted in a Maplet window. Does anyone have some suggestion on as I can make this? I am very grateful to anyone who may help.

solve({a1*alpha+b1 *beta=a1^2*alpha+2*a1*a2*gamma+a2^2*gamma*delta/beta,a2*alpha+b2* beta=a1^2*beta+2*a1*a2*delta+a2^2* (beta*gamma-delta*(alpha-delta))/beta, a1*gamma+b1*delta=a1*b1*alpha+a1*b2*gamma+a2*b1*gamma+a2 *b2*gamma*delta/beta,a2*gamma+b2*delta=a1*b1*beta+a1*b2* delta+a2*b1*delta+a2*b2*(beta*gamma-delta*(alpha-delta))/ beta, a1*gamma*delta/beta+b1*(beta*gamma-delta*(alpha-delta))/ beta=b1^2*alpha+2*b1*b2*gamma+b2^2*gamma*delta/beta,a2* gamma*delta/beta+b2*(beta*gamma-delta*(alpha-delta))/ beta=b1^2*beta+2*b1*b2*delta+b2^2*(beta*gamma-delta*( alpha-delta))/beta},{a1,a2,b1,b2}); Warning, computation interrupted

## How to solve this integral?...

I know these two integrals: int(sin(x)/x,x=0..infinity)=Pi/2 and int((sin(x)/x)^2,x=0..infinity)=Pi/2, so I want to know the answer to this integral int((sin(x)/x)^n,x=0..infinity), here n is a positive integer. Only assume(n>0) and additionally(n, integer) and then enter the above statement, Maple could not give an answer. Then I want to know whether there is an exact symbolic result of the integral and if so, how can I get it in Maple. 3x...

## Cross Product Symbol...

I have a question regarding a symbol for cross product. I just uploaded the file referenced at the bottom of this post, and when I viewed it in the file manager it looks different enought from the original file that anyone kind enought to help me will have to download the file. thanks View 2292_CrossProductSymbol.mw on MapleNet or Download 2292_CrossProductSymbol.mw