Toralf Westström

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bio website location age member for 10 months seen Jan 22 at 15:30 profile views 36

lost in computer science :) i'm a student at the university of rostock

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 Feb24 awarded Popular Question Jan21 comment Did i formulate this Linear Optimization Problem right? you mean this way? $$x_1-x_2 \leq 1$$ $$-x_1+x_2 \leq 1$$ And yes, after rethinking, i don't know why they Need to be positive anymore. I was used to it from other optimization problems. But i think it is not necessary here. Jan21 asked Did i formulate this Linear Optimization Problem right? Jan7 accepted Is $x^2 + 1$ irreducible over $\mathbb{Z}/_{3}[x]$? Jan7 revised Is $x^2 + 1$ irreducible over $\mathbb{Z}/_{3}[x]$? corrected some math Jan7 comment Is $x^2 + 1$ irreducible over $\mathbb{Z}/_{3}[x]$? I can see now, that $\sqrt{x^2 +1}$ has no Root in in $\mathbb{Z}_{/3}[x]$ ..(in fact it might be a complex root) I made a mistake in my equation. There is no root and thats why it is irreducible? right? Jan7 revised Is $x^2 + 1$ irreducible over $\mathbb{Z}/_{3}[x]$? corrected some math Jan7 asked Is $x^2 + 1$ irreducible over $\mathbb{Z}/_{3}[x]$? Dec10 comment Find all solutions for a system of linear equations over a given field oh allright.. and so the solution set consits of seven different solutions/vectors like: $$\left(\begin{array}{c} 5-3\cdot 1 \\ 2-3\cdot 1 \\ 1 \end{array}\right) = \left(\begin{array}{c} 2 \\ 6 \\ 1 \end{array}\right)$$ right? Dec10 accepted Find all solutions for a system of linear equations over a given field Dec10 comment Find all solutions for a system of linear equations over a given field I am definitly sure, my determinants are incorrect. :/ Dec10 revised Find all solutions for a system of linear equations over a given field improving language Dec10 asked Find all solutions for a system of linear equations over a given field Nov29 comment What is the congruence class of $x^3\mod x^3+x+1$? Okay, but now i think i have found one, that doesnt fit the pattern. see i we take $x^3+x^2+x$ .. than it would be ... $x^3+x^2+x\equiv x+1+x^2+x$ ... but that cannot be. Nov29 comment What is the congruence class of $x^3\mod x^3+x+1$? it wasnt me. but by the way. If i have $x^3+x^2$. It would be $x^3+x^2 \equiv x^2+x+1$ right? Nov28 comment What is the congruence class of $x^3\mod x^3+x+1$? Okay that makes sense for me. But it seems i am still not able to make my own calculations. So if have $x^3+x$ for example. It would be $x^3+x\equiv -1\equiv 1$ ? Nov28 comment What is the congruence class of $x^3\mod x^3+x+1$? Allright. So lets try another example, to see if i understand correctly. Lets take for instance $x^4+x$. So i would get $x^4+x\equiv x-1 \equiv x+1$ .. right? Nov28 accepted What is the congruence class of $x^3\mod x^3+x+1$? Nov28 comment What is the congruence class of $x^3\mod x^3+x+1$? @Pedro yes.. i didn't mentioned it, because i thought it wouldn't belong to the Task. So i think, i didn't understand Polynome congruences at all. Nov28 asked What is the congruence class of $x^3\mod x^3+x+1$?