Two subgroups are conjugate
118030
Two subgroups of the same index must be conjugate under these assumptions
45580
Intersection of conjugate subgroups is normal
41231
Subgroups of (Z,+) of order n
114431
Monoids and Subgroups
8483
A Particular Two-Variable System in a Group
104080
Group with order $pq$ has subgroups of order $p$ and $q$
116936
Commutator subgroup and subgroup generated by square.
62255
Notation question: Subroup generated by two elements?
49666
Generalization of index 2 subgroups are normal
13523
Are normal subgroups transitive?
115849
Are the Groups having all subgroups of same order conjugate classified?
151559
Please help: How to show that Aut(G) is a subgroup of Sym(G)
151210
How can we find and categorize the subgroups of $\mathbb{R}$?
102429
There are 2 groups of order 6 (up to isomorphism)
149578
Subgroups of $(\mathbb Z_n,+)$
157330
Showing the image of a subgroup is a subgroup.
39938
Subgroups of a cyclic group and their order.