Toralf Westström
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 Feb18 awarded Popular Question Nov27 awarded Popular Question Nov4 awarded Notable Question Sep24 awarded Autobiographer Jul2 awarded Curious May11 awarded Popular Question May9 awarded Popular Question May4 awarded Yearling Feb24 awarded Popular Question 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.