Yuchen Liu
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 Apr 18 awarded Yearling Feb 25 awarded Popular Question Sep 13 awarded Enlightened Sep 13 awarded Nice Answer Apr 18 awarded Yearling Jul 2 awarded Curious Apr 18 awarded Yearling Mar 7 answered Does $\,f_* \mathcal{O}_{X_T} \cong \mathcal{O}_{T}$ hold in this situation? Jan 13 awarded Nice Answer Nov 19 answered Why is it better to have the induced map by a line bundle $L$ into projective space map into $\mathbb P |L|^*$? Nov 9 answered Poles of abelian differentials Oct 25 comment Is the complement of a codimension 2 subvariety of an affine variety affine Thanks for your answer! Oct 25 answered Is the complement of a codimension 2 subvariety of an affine variety affine Oct 23 comment Is a scheme with a single closed point affine? I think you should require $X$ to be connected, otherwise the disjoint union of a scheme without closed points and the spectrum of a local ring is a counterexample. Oct 21 comment Embedding $\mathbb A^2-(0,0)$ into $k^n$, the image is not closed @AsalBeagDubh: Sure, thanks. Oct 21 answered Embedding $\mathbb A^2-(0,0)$ into $k^n$, the image is not closed Oct 14 comment Dimension of a meromorphic differentials space Do these degree $k$ meromorphic differential forms have only simple poles at $z_i$? Oct 13 revised Let $X=\operatorname{Spec} k[w,x,y,z]/(wz−xy)$. Show the Weil divisor cut out by $w=x=0$ is not locally principal. added 122 characters in body Oct 13 comment Let $X=\operatorname{Spec} k[w,x,y,z]/(wz−xy)$. Show the Weil divisor cut out by $w=x=0$ is not locally principal. Dear @Gazerun, I have edited my answer by adding a proof of the affiness of $X-Z$. Oct 13 revised Let $X=\operatorname{Spec} k[w,x,y,z]/(wz−xy)$. Show the Weil divisor cut out by $w=x=0$ is not locally principal. add a proof of the affiness of $X-Z$