Primitive element in $L^H:=\{\alpha\in L:\thinspace \sigma\alpha=\alpha\thinspace$ $\forall\sigma\in H\}$
139622
Generator of rational functions unchanged under $\sigma(X) = X + 1$
66895
A condition for the image of a metrizable space to be metrizable
152212
Prove that the natural map $\alpha : \text{Hom}(X,\text{Spec} A) \rightarrow \text{Hom}(A,\Gamma(X,\mathcal{O}_X))$ is an isomorphism
31049
If $p$ is an irreducible element of an integral domain $D$, and if $e$ belongs to $D^\ast$ prove that $ep$ is also ireducible
103552
The minimal polynomial of a primitive $p^{m}$-th root of unity over $\mathbb{Q}_p$
114524
Proof Verification: the orthogonal complement of the column space is the left nullspace
152721
Help showing $H_n=\sum_{h \in H}h \in F[H]$ is a simple submodule
81543
Finite abelian group contains an element with order equal to the lcm of the orders of its elements
68153
How to show that $L^p$ spaces are nested?
158189
If $\{E_\alpha\}$ is connected, $\bigcap\limits_{\alpha\in A}E \neq \emptyset$, then $\bigcup\limits_{\alpha\in A}E$ is connected
62484
Proving Hartshorne's Exercise I-1.9 by using exercise I-1.8
63115
If $\alpha$ is an indecomposable ordinal, why $\Gamma(\alpha\times{\alpha})=\alpha$?
56143
Proof of a basic $AC_\omega$ equivalence
110672
Is it true that $aH = bH$ iff $ab^{-1} \in H$
84132
Number of preimages of a group element under a homomorphism.
24785
How prove this equation $\alpha=\aleph_{0}\alpha$
140550
Irreducible element iff prime norm in Gaussian integers?