Necessary and sufﬁcient conditions on m and n for $\Bbb F_{p^n}$ to have a subﬁeld isomorphic with $F_{p^m}$.
6855
Subfields of finite fields
154318
Can a field be isomorphic to its subfield?
108664
Sufficient and necessary conditions to get an infinite fiber $g^{-1}(w)$
46746
How to prove if $u\in W^{1,p}$, then $|u|\in W^{1,p}$?
35547
Does $\{f_ng_n\}\to fg$ uniformly?
137511
Trying to show that $\sup \{b^p:p\in Q,\;0<p<x\} = \inf\{b^q:q\in Q,\;x<q\}$
94571
How can we prove that $N_G(H)=H$ implies $N_{f(G)}(f(H))=f(H)$
70872
Isomorphism of quotient modules implies isomorphism of submodules?
79734
Is every sub-lattice of $\mathcal P(X)$ isomorphic to a sub-lattice of $\mathcal P(X')$ containing singleton sets?
76140
The supremum norm is submultiplicative
18343
Counting homomorphisms between $\Bbb Z$ and $\Bbb Z_n$ and also between $\Bbb Z_n$ and $\Bbb Q$
117131
Canonical Isomorphism Between $\mathbf{V}$ and $(\mathbf{V}^*)^*$
57166
Showing that $\Bbb R[x] / \langle x^2 + 1 \rangle$ is isomorphic to $\Bbb C$ question
151354
Why are there no non-trivial regular maps $\mathbb{P}^n \to \mathbb{P}^m$ when $n > m$?
148685
Equivalences of definitions of submanifolds in $\mathbb{R^n}$
9806
$M$ finitely generated if submodule and quotient are finitely generated.
157597
Homeomorphism between $\mathbb{Q}$ and $\mathbb{Q}(>0)$, and $\mathbb{Q}(\ge 0)$