Hello, 

I have to solve a system of two equations but I have the error message "Warning, cannot evaluate the solution past the initial point, problem may be complex, initially singular or improperly set up"

Here is what I did :

I have a problem in determine the relation between two variables in a polynomial equation f(l2,v)=0. The results of two methods puzzled me.
The first method I tried is use the fsolve command.
In equation f(l2,v)=0,the range for v is [3405,5054] and l2 is a complex variable.
I plotted the figure for the l2=l2(v) in complex plane.Because the degree of l2 is 8, I have eight curves in the figure.
Obviously, the order in the result of fsolve is indefinite, so it can...

please please help meeeeeeeeeeeeeeee

> restart;

> Ndx := 6; Ndy := 3; imax := Ndx+1; jmax := Ndy+1; Tb := 0; Td := 60; Th := 180; Tg := 80;
                                                     ...

Hi guys,

Maple solved numerically the following system of two coupled PDEs.

PDE1 := diff(a(x,t),t) = - 2*a(x,t) + 1*b(x,t)
- exp(- 1/(1 - (x-0.5)^2))*( diff(a(x,t),x,x) + a(x,t)*diff(b(x,t),x,x) - b(x,t)*diff(a(x,t),x,x) );

PDE2 := diff(b(x,t),t) = - 1*b(x,t) + 2*a(x,t)
- exp(- 1/(1 - (x-0.5)^2))*( diff(b(x,t),x,x) - a(x,t)*diff(b(x,t),x,x) + b(x,t)*diff(a(x,t),x,x) );

IC := [ a(x,0)=exp( - 1/(1 - (x-0.5...

I have a variable x, and trying to get an output of E00. Here is what I have :

with(LinearAlgebra):
x:=2:
g:=Matrix([[3ξ+5x,8x-7ξ,2ξ],[ξ,4ξ+9x,7ξ].[5ξ,ξ,4x-6ξ]]):
h:=RandomMatrix(3):
p:=g.h:
E00:=(map(int,p,ξ=1..3))

I would like to change x to 2,4,6,8,16 and have different output of E00 and later on plot a graph. I have been trying to run them seperately. Is there a way for me to key in the inputs of x at one go? Please help. Thank you very much.

Hello,

I am having probrems to do the following.

- I want to solve 2 equations A and B, which have to be solved numerically. (get x(t) and y(y))

- With the solution to A and B, I have to input a combination into other equation C. And then get the solution for other variable. (solve z''(t) + (k/t^2 + V(x(t),y(t))z(t)=0)

I could solve evertything togewther. The only problem is that the second part...

Which library is this hflogb implemented in? I could not find it in either libc or libm.

What is the exact name of the function that has been changed in 64bit distributions?

(Knowing this, there would be an easy fix. Even now, one can run older maple on newer linuxen: simply copy the old system libs (from /lib/x86_64-linux-gnu and /usr/lib/x86_64-linux-gnu to a library under the maple install dir and tweak LD_LIBRARY_PATH in the maple wrapper script), but identifying...

Dear MaplePrimes,

I have a problem findning an explicit solution to an equation solve((P[h]-tau[h])*q[hf] = (P[f]-tau[f])*q[fh], [lambda[h]])]. Is you can see from my syntax, I have assumed a RealDomain and also that all parameters including the varialbe I'm solving for lambda[h] are positive, and also that lambda[h] is between 0 and 1. This is my syntax:

test := `assuming`([RealDomain:-solve((P[h]-tau[h])*q[hf] = (P[f]-tau[f...

hi,

I am trying to solve a system of non linear simultaneous equations.

It keeps showing the warning that solution may have been lost.

I need urgent help.

Download eqn.mw

Thank you.

Dear All,

I am trying to create a matrix of a function nsi(m,k) file attached to the question.

I shall be very thankful if you could help me in creating a matrix as explained in the file.

maple1.mw

Best Regards

A.Q

Hi,

I would like to solve the system of PDEs

PDE1 := diff(a(x,t),t) = - 2*a(x,t) + 1*b(x,t)
- 4*( diff(a(x,t),x,x) + a(x,t)*diff(b(x,t),x,x) - b(x,t)*diff(a(x,t),x,x) );

PDE2 := diff(b(x,t),t) = - 1*b(x,t) + 2*a(x,t)
- 4*( diff(b(x,t),x,x) - a(x,t)*diff(b(x,t),x,x) + b(x,t)*diff(a(x,t),x,x) );

subjected to the initial value

IC := [ a(x,0)=exp( (x-0.5)^2 ), b(x,0)=0 ];

If I try to do so by typing

pdsolve([PDE1,PDE2],IC,numeric);

I want to now how to convert from maple to letec

thankyou

Any word on an applications collection DVD(s) from maplesofts applications center for offline browsing?
I had made the suggestion a while ago.  What is the status of that project?  Is it still under consideration?

I thought it could be purchased seperately, or included in new releases of Maple.

Features
  * All the applications in the application center in a similar browsable format
  * Update button that updates a folder on your...

What is the number of the Latin squares of order 5 (see http://en.wikipedia.org/wiki/Latin_squares
for more details), having all  entries of its diagonals different (e.g. Matrix( [[1,2,3,4,5],[5,3,4,1,2],[4,5,2,3,1],[2,4,1,5,3],[3,1,5,2,4]] )