Dear all

I have one question regarding to dsolve.

Let say I have simple function,

 dx/dt =A+Bx

 dy/dt =A'+B'y

when I want to get graph of x as function of time or y as fuction of time, I can use 'dsolve'

For example, I can put "" soln:=dsolve ((ABOVE EQUATION, ICs),numerical,implicit=true) ""

                                     plot(soln,x(t) or y(t))

Also, When I want to get x value or y value as function of time, I can use soln(t), t could be whatever I want.

However, I want to get or draw graph " t " as function of x or function of y. For example, I want to know  t value when x=3 or I want to know t value when y=5. Above equations are simple, so I can calculate by hand. but I want to know which command I need or which ways are in MAPLE to get the value.

Thanks.

hi,

I am trying to plot the polygon but it isnt working. Please help

i put

triangle := polygonpolt3d ([13,11,12], [16,10,18], [14,10,7]) :

display3d (triangle)

I have a complicated equation which you can find in the file below. I want to multiply both sides of equaiton by cos(beta[1,j__1]*z) and integrate from 1 to L. I have many such similar equations so I decided to write a procedure to do these staffs for me.

Can you give me simple suggestions on how to write such a procedure. The procedure will take the "equation", "multiplier" and "limits of integration" as inputs and gives the "integrated equation" as the output. Integration is perfomed by the inert function "Int".

Many thanks.

Equation.mw

Hello guys

I have a question:

I have an equation like below. Always it has different order for example :

T1:=q3*(r^6)+q2*(r^4)+q1*(r^2)+q0:
solve(T1=0,r):
and sometimes:

T2:=q5*(r^4)+q6*(r^2)+q7:
solve(T2=0,r):
q0,q1,q2,q3,q4,q5,q6 and q7 are constants.

We know that for T1 It has two real answer and for T2 we have any real answer.

How can I specify generally the real answers for all of them?

I want to use these real answer for another equation.

Thanks

Hi.

I need you to answer to thos question using maple,

I have x'(t)=e^{2*x(t)}  + alpha -2*x(t),  where alpha is a constant in R.

I would like to compute the equilibrium points and if there is a saddle-node bifurcation.

Thank you very much.

I'm trying to solve a differential equation in Maple given by:

 when y(3) = -7.

I should get the result

but for some reason I get 

I solved it by writing:

I have Maple 18 if it makes a difference.

Hi, I have an equation and I want to plot it for a set of inequalities, is this possible or will i need to insert values for the constant?

So if i have the equation;

y=(X_0-aX)/a+(X_0-bX)/b, can I plot y given that: X_0>bX and <aX

Hello.

I have a line integral and i want to calculate and graph this line integral.

The line integral comes from a physical problem, the integrand is good in the interval [0, 2*Pi] and the value of the integrand at zero = the value of the integrand at 2*Pi.

The problem is when i use the trapizidal rule to calculate the line integral.

The results is so bad, i.e.  the value of the line integral at zero not equal to the value of the line integral at 2* Pi.

where is the problem.

Any one could help me.

Dear all

I want your help in a problem.I want to substitute in a summarization ,the variables for Vi and ξi.Because the number of variables are more than 200 I want to know if there is a way to take them from the excel sheet and put the to my program.attached are the maple worksheet and the variables table

P.s. i have done it for 44 variables

Hi I have one question.

I want to draw y=sin(t). x-axis is time and y-axis from 0 to 1.

I want to convert x-axis into cycle number. For example, in case of y= sin(t), one cycle is 2phi.

--------------------------------------------------------x-aixs                ->  -----------------------------------------------------x-aixs

1                    2phi                       4phi               (time)                                         1                         2           (cycle number)

It is simple function, so if I put t/2Phi instead of t, I can get a graph with cycle number. But Do you know other ways to convert that? 

Hi,

How are you. Nice to meet you once again.

I need your help  to give an answer to  this question:

I have two vector v1:=[1,2,3,4,5,6,7,8]; and v2=[9,10,11,12,13,14,15,16];

I would like to construct a matrix whone first colunm is v1 and last colunm is v2 and all the rest is ZERO.

Many thinks.

My old disc with the maple version 17 worked perfect, but later the disc has colapsed. So I changed the disc and installed the programm. The installation and the activation were successfull. But the programm doesn't start more. Only the command-version in dow-window. What is wrong?

I have a Text Region (made with T tool) which does contain some math elements. However, as I understand it, such a region should not be executable. When execution is attempted (by using ! with the cursor in the region), the cursor should sinply jump to the next group (executable or not). Instead, I get the following output error line as though it were an execution group and the cursor remains in the region.

Error, "=" unexpected

How is this possible?  Is there s code hidden behind the visible text that causes this?

This happens even after I copy the whole text in the region to a text region in another worklsheet.

Please, how do i compute,solve and derive d' Alembert wave formula with maple since wave=How do i derive d'Alembert formula using maple and also how to solve any wave problems eg IC u(x,0)=1/2e^-x^2 and ut(x,0)-e^-x^2 when c=4

For the following maps, determine whether they are linear transformations or not, and present an
appropriate proof.

(a) T : R^4 → M2,3 given by T(a, b, c, d) =  [a   a^2   a^3
                                                                   b    c       d ]
.
(b) T : M2,3 → M3,2 given by T(M) = M^T (transpose of M)
.
(c) T : P3 → P3 given by T(p(x)) = p(2) + 3x · p'(x), where p'(x) denotes the derivative of the polynomial p(x).

i know that the 2 rules for proving are T (u+v)= T(u) + T (v) and T (ku)= k T (u).....but how do i show it with the questions above, like do i just take any numbers , so confused