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seen Oct 6 at 12:29

Jul
30
accepted Question on Forster's proof of the residue theorem
Jul
20
accepted Why $F \leq F' \; \Leftarrow \; \forall x \in X \; F_x \subseteq F'_x$?
Jun
18
accepted A condition for a homogeneous ideal to be prime
Jun
5
accepted Why is it Artinian?
Apr
11
accepted If $X \times \{0\} \cup A \times I$ is closed in $X \times I$. Then, is $A$ closed in $X$?
Mar
24
accepted If a chain of distinct irreducible closed subsets of a quasi-affine variety $Y$ is maximal, a chain of their closures is maximal in $\overline{Y}$?
Mar
7
accepted Isomorphism of an extension field of a field of finite transcendence degree
Jan
31
accepted The kernel of homomorphism of a local ring into a field is its maximal ideal?
Nov
10
accepted A question about the proof of the open mapping theorem in “Functional Analysis” by Rudin
Nov
10
accepted Reference request for quadratic form diagonalization
Oct
6
accepted My proof of “the set of diagonalizable matrices is Zariski-dense in $M_n(\mathbb F)$”.
Sep
15
accepted About the proof of the existence of a decomposition of subset of $\mathbb{A}^n$
Jul
24
accepted Is it true that if $\alpha \in \operatorname{Frac}(A)$ and $s\alpha \in A$, then $\alpha \in S^{-1}A$?
Jan
27
accepted Containment of extension fields in a Bourbaki proof: $K(S)\subset K(B)$?
Oct
19
accepted Why does the continuity of $(x,y) \rightarrow x-y$ mean the commutativity of a topological group?
Oct
19
accepted Is it always true that |1+1|>1 in an Archimedean valuated field?