bruno171092's profile - activity

I use Sage in my Mozilla Firefox browser as notebook and wanted to know how i get line numbers in my computing cells.

It is ok :) I just forgot to use return ;)

Thanks :) That was exactly the problem. I only used print instead of return :)

hello guys, i wrote a new function, lets call it "func", that has some matrix as input and also some matrix as output. the thing is, i want to declare the last output of the function as a new variable x ( x=func(A) for a given A) the problem is: if i say

x = func(A)
print x

i get :

none

I guess the problem is, that i calculate more than one thing while the function is running, but at the end i just want to able to use that one single output of the function for further use...

I have this problem: Lets say i have an matrix A and use A.gram_schmidt() on it. then i get a matrix B whose rows are orthogonal. So what do i do now if i want use the vectors of the rows. How can i make them to variables practical? I tried this:

O, t = A.gram_schmidt() 
for i in range(n):
    wi = O.row(i)

But clearly this doesnt work, because sage doesnt identiy the "i" in "wi"...

Oops... that was quite some fail... Sorry :)

Hello Guys i have the following problem.

I want to write a function whose input is a Matrix. A small example:

    def Dimension(Matrix):
        n = Matrix.nrows()
        return n
  A = ([1,0,0],[0,1,0],[0,0,1])
  print Dimension(A)

but then i get :

AttributeError: 'tuple' object has no attribute 'nrows'

How can I write i function that has an Matrix as input?

IOError: [Errno 2] No such file or directory: '/home/nbruin/hist.txt'

I thank you a lot buddy. But i dont want to cause you any more trouble... Forget it

well the information is right except that my files arent saved there anyway. and your tipp with notebook isnt working either. "cp" is not defined...

I have no clue what sftop-ing is... and I somehow feel like i am a little bit too much of an computer noob to get it right...

Well thanks a lot... I got out, that the path is

/home/sage

but unfortunately i have no clue how i get there... Sorry buddy, that i am still not able to do it after all your efforts :/

Hmm i used the history command.... but now i dont find the file -_- I even searched for it with the windows-function... but nothign is found... God... that Virtual Machine for Windows is frustrating... Do you have Linux or Windows yourself?

Hello guys, I have the following question:

Lets say i run a sage session and at the end i got this written in my Interactive Shell after the session

sage: Zmod(7)
Ring of integers modulo 7
sage: R.<x> = Zmod(7)[]
sage: R
Univariate Polynomial Ring in x over Ring of integers modulo 7
sage: RR = R.quotient(x^7 - 1)
sage: RR
Univariate Quotient Polynomial Ring in xbar over Ring of integers modulo 7 with modulus x^7 + 6
sage: f = RR(x^6-x^4+x^3+x^2-1)
sage: f
xbar^6 + 6*xbar^4 + xbar^3 + xbar^2 + 6

And now i want to save all of the above into a txt-file. Is that possible and when yes how?

Hello Guys,

i have the following question. I use Sage on Windows so I use the Sage Notebook in my browser. I wanted to know if there is a possibility to get more than one output from that without going to a new "compute cell" for everything i want to be computed... For example: When i have

sage: Zmod(7)  +++
sage: R.<x> = Zmod(7)[]
sage: R +++
sage: RR = R.quotient(x^7 - 1)
sage: RR +++
sage: f = RR(x^6-x^4+x^3+x^2-1)
sage: f +++
sage: g = f^(-1)
sage: g +++
sage: g.parent() +++
sage: g*f +++
sage: f*g +++

i only get output from the last command (as result 1) But i want to get output from every line i marked above with +++. Is there annother possiblilty than using a new compute cell after every line i want to have output from?

Hello Guys, i have the following problem.

I got the Ring $ R = \mathbb{Z} /(x^7 -1)$ and the polynom f(x) = $x^6 - x^4 +x^3 + x^2 -1 \in R$ and want to compute the inverse of f(x), $f(x)^{-1}$. How do I do that?

Thanks once more.

Thanks a lot. Sorry to bother you more, but... when i use $ R = (\mathbb{Z} /7 \mathbb{Z}) /(x^7 -1)$ instead, does it work the same? And in you line 3 you say: "f = RR(x^6-x^4+x^3+x^2-1)"... i dont know exactely what this is good for (like i said... i am totally new to sage). Does that mean you are are looking at x^6-x^4+x^3+x^2-1 as an element in RR?