Showing that language $L^{'}$ is regular given $L$ is regular
137646
show that language $L'$ is regular (given $L$ regular)
68153
How to show that $L^p$ spaces are nested?
25874
Showing that a certain map is not flat by explicit counterexample
52642
Show that $\text{C}/c \cong (c/(\text{C}^{\text{op}}))^{\text{op}}$
117688
Prove that $\def\Aut{\operatorname{Aut}}\Aut(\mathbf{Z_{n}})\simeq \mathbf{Z_{n}^{*}}$
32965
Proving that for infinite $\kappa$, $|[\kappa]^\lambda|=\kappa^\lambda$
136943
A problem with a proof about formal series in Lang's Algebra
107842
Behaviour of ($\overline{a}_n)_{n=1}^{\infty}$ and ($\underline{a}_n)_{n=1}^{\infty}$
1043
Image of $L=\{z\in\Bbb C \mid a\operatorname{Re}(z)+b\operatorname{Im}(z)+c=0; a^2+b^2\neq0; a,b,c\in \Bbb R \}$ under the function $e^z$
63036
Proving that $\dim(\mathrm{span}({I_n,A,A^2,...})) \leq n$
133884
A proof using Yoneda lemma
127047
How to show that $\sum_{i=1}^n | \langle f, f_i\rangle |^2 \leq \Vert f \Vert^2$
69740
Is the following statement true ? If $L$ is a decidable language and $L' \subseteq \; L$, then $L'$ is also decidable ? Prove your answer is correct
120311
Equivalence of Axiom of Regularity
120010
Show that $\aleph_{\alpha}^{\aleph_{1}} = \aleph_{\alpha}^{\aleph_{0}}\cdot 2^{\aleph_1}$
92588
Showing that $(C_0([0,\infty)), \|\cdot\|_\infty)$ is complete.
41520
Prove that $L(V,W)$ forms a vector space