I suffer from floaters, (objects that appear in ones vision), a condition that is worsened by looking at white surfaces.  Is there a way of changing the background colour of a maple worksheet from white to a darker shade, perhaps a light grey or something?

I have a very large system of rather long equations.   I need to find a way to have maple recognise if two equations within the system are the same.  I've been attempting to do this by adding each of them to the same set.  Maple automatically eliminates two identical entries in a set, so this works quite well for, say, x+y=0 and y+x=0 - maple knows these are the same and deletes one from the set automatically.  However it does not recognise that x+y=0 is the same as 2x + 2y = 0.

Is there a way to stop maple at a particluar line in a worksheet> I frequently have to compile my worksheet from the beginning up to whatever line I'm writing on (which may be in the middle of the file).  RIght now I'm highlighting all lines above my current one and clicking the ! symbol.  Is there a command I can type, which will allow me to click on the !!! button but will stop computation at the line on which the command is written? Continuously highlighting...

Hi,

I'm having trouble getting to grips with this problem.  I have a set of 21 objects A:={a,b,c,d,e etc} and I want to create another set B of length 10 consisting of some of the elements of A. I then want to carry out a test on B.  However, I then want to repeat the proccess for another set B and another and another until all possible set Bs have been tested. For example

A:={a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u} #This set is constant and should never change

I'm attempting to solve a system of 47 equations (for 47 unknowns) analytically via matrix methods.  My equations can be written as the product of a 47x47 matrix of coefficients and a 47 row column vector of variables.  I'm trying to find the determinant of the 47x47 matrix of coefficients.

I've done this succesfully for simpler systems (or around 20 equations) however when I try to use the same method for this larger system I get the error (after a few minutes of computation)...