I am using the ExportMatrix command to save matrices to .txt files. Is there a way to use a variable to automatically create the text file name?

For example (I know this doesn't work):

In maple 17, 

solve({b-a*sqrt(1+a^2+b^2)=a^2*(a*b-sqrt(1+a^2+b^2)), a-b*sqrt(1+a^2+b^2)=b^2*(a*b-sqrt(1+a^2+b^2))});

outputs

a=a , b = -a/(1+a)

If you set a =1  and b = -1/2 you will see this is not a correct solution.

Good afternoon sir,

I am M.Anand working for SRIIT, as Assistant Professor in Mathematics.

I request you to provide me the correct Maple commands to generate large matrices whose elements are defined in terms of i & j in piecewise function pattern for example

How to generate the matrix A where the elements a(i,j) are defined as

a(i,j)=2i    when j=i   and i=1,2,...,80

a(i,j)=0.5i  when j=i+2 and i=1,2,...,78...

Hello,

Maple_-_Upload.mw

See the upload for my worksheet.

When opened: Combine the first picture with the second picture and you will get the third picture, where the green filled box is a 'safe zone'. Now what I want is to find the intersection between the green line (=0.7) and the red line (the curve), which gave me two answers, as I wanted! No problem at all.

Now when the fourth picture is combined with the fifth picture this results in the sixth picture. So again I tried to find the intersection between the two lines (this time the green line with the blue line; I just name it to be sure that the idea is clear). But this time Maple doesn't give me the points of intersections. How come? I think it has something to do with the procedures, but I can't figure out what it exactly is.

I hope someone can help me out on this.

Thanks,

Frank

Find all prime numbers from 1 to 300.

I would like to pay attention to the article "Words and More Words" by Joseph Malkevitch. Here are a few  intriguing references:

M. Morse, A solution of the problem of infinite play in chess, Bull. Am. Math. Soc., 44 (1938) 632.

M. Morse and G. Hedlund, Symbolic dynamics, Am. J. Math. 60, (1938) 815–866.

Lothaire, M. Applied Combinatorics on Words, Cambridge U. Press, New York, 2005.

I have a monomial in 8 letters j_0, j_1, j_3, j_4, j_6, j_10, j_11, j_15 with corresponding exponents b_0, b_1, b_3, b_4, b_6, b_10, b_11, b_15. I would like Maple to calculate 0*b_0 + 1*b_1 +3*b_3 +...15*b_15. I know indets returns a list of the variables, but I am not sure how to pull off the indices and exponents? Thank you very much for the help!

https://www.facebook.com/pages/Matemática-Computacional-Trujillo/145132492343285

When I run "sum(a[1/k],k=1..n);", I get "Error, (in IntegerSub) too many levels of recursion". But it's OK to run "product(a[1/k],k=1..n);". Furthermore "Error, (in IntegerSub) too many levels of recursion" cannot be caught.

Jeff

In a box we have cards number and

Let . Find ?

Hi,

How would I ask Maple to display a expression and then evaluate it?

For example

Diff(5,x)=value(Diff(5,x));

or

Diff(5,x)=diff(5,x);

But do I really have to copy the lhs to do rhs every time?

Any simpler way?

PS: I am using 1-D input and I'd like to keep it that way.

Hi.
I am trying to use a new Physics:-Library:-SortProducts command. However it doesn't work in my case.

restart; 
with(Physics); 
with(Library); 
Setup(mathematicalnotation = true); 
Physics:-Setup(anticommutativeprefix = psi); 

for i to 4 do 
ap[i] := Creation(psi, i, notation = explicit); 
am[i] := Annihilation(psi, i, notation = explicit) 
end do; 

z := A*ap[2].am[2].ap[1].am[1]+B*ap[1].am[1].ap[2].am[2]+C*ap[3].am[3].ap[4].am[4]:

Solve the following system of equations