I tried to solve a non linear coupled boundary value problem in MAPLE using DSolve command. The code is :

alias(eta = e, theta = t)

Eq[1] := 5*(diff(F(e), `$`(e, 3)))+(m+3)*F(e)*(diff(F(e), `$`(e, 2)))-(2*m+1)*(diff(F(e), e))^2-(4*m+2)*H(e)-(m-2)*e*(diff(H(e), e)) = 0

Eq[2] := diff(H(e), e) = t(e)

Eq[3] := 5*(diff(t(e), `$`(e, 2)))/Pr-(m+3)*F(e)*(diff(t(e), e))-5*m*(diff(F(e), e))*t(e) = 0

BCs := [F(0), (D(F))(0), (D(F))(infinity), t(0)-1, t(infinity), H(infinity)]

It's possible to define a field in Maple 15 with 2 kinds of indices, say type spacetime μ,ν,ρ... and one of the type integer, i,j,k varying from 1 to n?

I would like to define a field like A_μⁱ where:

A_μ¹=A_μ

A_μ²=B_μ 

and so on.  

Thank you Washington Inacio

Problem: Write the equation of the straight line (d) through the point A(1,-2,3), cut the straight line 

Delta: x = 3*t+1, y = t, z = t-1 and parallel to the plane (P): x + 2*y + 3*z + 4 = 0.

We know that, if the straight line (d) through the point A and parallel to the plane (P), then (d) lies on a plane (Q), which (Q) through the point A and parallel to the plane (P).

I am learning about programming; I have this equation:

2*K2*alpha*t=ln[(A0+E(beta-1/2)/(A0-E(beta+1/2)

The values of t, E are a list of values.

and K2 alpha and beta are unknown but i dont know how to do for graph the part of ln vs time and fit it to a line.

Im asked on one of my problem sheets to write a procedure to inverse a square matrix using LU factorization and using partial pivoting. I can do all of these using simple pen and paper but am struggling towrite the procedure, especially to involve the partial pivoting and to then solve the linear system. Any ideas how I can do this question?

Hi all,

I have data which I want to give a simpler and a smaller interpolation function. Not necessary with Cubicspline as in the code attached (polynomial, exponential, etc..).

Thanks in advance

interpolation.mw

Dear,

I have problem that after using assume(...) and then use label such as (1.1)... then the assumptions are lost. Is it a bug?

Below is my attached worksheet (I used Maple 13 , I don't know if later version is better?)

label_and_assume.mw

Actually , the lost of assumptions will cause some problems such as make integration become unevaluated.... and will take you a hard time to debug...

Hi,

I need help of your expertize in solving the following queries:

I would start with a sample equation:

Eq1 = u_{xxxx} + u_{xxyy} - v_{xxxy} - v_{xyyy} 
where u_{xxxy} represents 4th order pde of u i.e. d^4/(dx^3 dy).

I get a equation similar to Eq1 (but quite complicated) on solving the 
equilibrium equations. I would like to collect the similar derivatives
for variable u and v together like

Eq2 = d^2/d x^2 ( u_{xx} + u_{yy} ) - d^2/dx dy ( v_{xx} + v_{yy} )

hi, could You help me to write script(program) with maple( maple 13) exercise....?

1) The velocity of a freely falling object near Earth's surface is described by the equation
dv/dt=-g     (1.1)
where v is the velocity, g=9.8m/s^2 . Write a program that employs the Euler method to compute to solution to (1.1); that is, calculate v as a function of t. For simpilicity, assume that the initial velocity is zero-that is, the object starts from rest-and...

Hi and thank you for looking.

I have recently begun advanced maths and need help with maple. Is it possible to input an algebra equation and have maple rearrange it to make it a different subject?

I am new to maple and maths again so any help much appreciated. 

Also can maple for example if I input 6 equations could it or is there a way to get maple to pick two like equations out of them.

Thanks again, Danny 

Hi and thank you for looking.

I have recently begun advanced maths and need help with maple. Is it possible to input an algebra equation and have maple rearrange it to make it a different subject?

I am new to maple and maths again so any help much appreciated. 

Also can maple for example if I input 6 equations could it or is there a way to get maple to pick two like equations out of them.

Thanks again, Danny 

hello, I am trying to call a matlab function from maple and get error msg.

I did instruction about set up matlab but it doesn't work.

I would highly appreciate if someone could help me out with this. Thanks Sina

I have used dsolve to obtain the solution of the inserted two systems below. The obtained results for the first system is accurate, where the obtaind solution of the second one is not accurate. I think the problem is in approximating the first system solution to be used in the second one. I would appreciate any advice on how to  obtain accurate results for the second system

 restart; endv := 5; sys0 := diff(f(x), `$`(x, 2...

I used dsolve to obtain the solution of the attached two systems of ODEs, where the second system depends on the solution of the first one. The obtained results for the first system is accurate, where the obtaind solution of the second one is not accurate. I think the problem is using cubic spline approximation. I would appreciate any advice on how to  obtain accurate results for the second system

I am "playing" around with the Maplet Builder and I am having some problems:
Let say I have three separate vector columns with data loaded in maple ie A, B and C.

i) I want the user of the maplet to be able to select ie highlight a vector from the three
available vectors which are presented in a drop down box.

ii) A button when clicked on plots the data in the selected vector.


How can I do this with the Maplebuilder??  I will need step-by-step instructions.