Show $H \cap L_i$ is a Cartan subalgebra of $L_i$
131843
Cartan subalgebras of a semisimple Lie algebra
115414
Lie Algebra of $SL_n(\mathbb H)$
146952
When can I say that $\cup H_i$ is a group?
5599
Proving an inclusion for the derived group
10477
Finding the closure of A=$\mathbb Q \cap [0,1]$.
152721
Help showing $H_n=\sum_{h \in H}h \in F[H]$ is a simple submodule
28934
Presentation of SL$(n,\mathbb{Z}_p)$
2626
Show $\langle a^m \rangle \cap \langle a^n \rangle = \langle a^{\operatorname{lcm}(m, n)}\rangle$
149856
Image of ring homomorphism is a subring
8456
Prove that $SL(2,\mathbb{R})$ acts transitively on the upper half plane
140446
Prove that $A \smallsetminus (A \smallsetminus B) = A \cap B$
138069
Proof that $\bigcap_{a\in A} \bigg(\, \bigcup_{b\in B} F_{a,b} \, \bigg) = \bigcup_{f\in ^AB} \bigg(\, \bigcap_{a \in A} F_{a,f(a)}\,\bigg) $
144502
Showing that $A\cap B = A\setminus (A\setminus B)$
128256
How to prove $H_1(\mathbb{C}/\Lambda, \mathbb{Z})$ to the lattice $\Lambda$ ,$\gamma \mapsto \int_\gamma dz$ is well defined?
146028
$GL(n, \mathbb{C})$ is isomorphic to a subgroup of $GL(2n, \mathbb{R})$
75863
how to prove $f^{-1}(B_1 \cap B_2) = f^{-1}(B_1) \cap f^{-1}(B_2)$
151621
$G$ a group and $H, K\mathrel{\unlhd}G$. Assuming that $H \cap K = \{1_G\}$ and $G = \langle H, K \rangle$, prove that $G \cong H \times K$