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57 Questions

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$F$ is a field, $n>1$ is it true that $\mathrm{Aut}(F[x]/(x^n))=F^{\times}$?

may 12 at 10:38 Lee Mosher 22.9k

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char$(K)=0$ then $K(x^{2}) \cap K(x^{2}-x)=K$ [duplicate]

may 12 at 9:17 user26857 35.2k
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$R=\{ m+nr\sqrt{2} \mid m,n \in \Bbb Z \}$ and $I_{a,b}=\{ ma+n(b+r\sqrt{2}) \mid m,n \in \Bbb Z \}$

may 11 at 14:02 user 405

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Separable and purely inseparable extensions over fields of characteristic $p$

apr 22 at 8:38 user 405

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Order of a map $\Bbb F_{p^n}\to \Bbb F_{p^n}$which maps $x$ to $x^{p} -x$ [duplicate]

apr 20 at 5:41 user 405

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A chain between two positive roots having same length

nov 4 at 16:41 user 405

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Maximal ideals of $\Bbb R[x,y]/(x^2+1,y^2-1)$

oct 8 at 13:28 user 405

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