2:34

To every subgroup of Real numbers we can find a normal subgroup of GL2(R)

5:46

Proof that Z x Z is not a cyclic group

10:38

Cyclic Groups, Generators, and Cyclic Subgroups | Abstract Algebra

4:06

S3 is not cyclic.

5:12

External Direct Product of Groups Example: Is ℤ2 ⊕ ℤ2 a Cyclic Group?

7:10

If a is a generator of a cyclic group G, then it’s inverse is also a generator.

11:40

Every Subgroup of a Cyclic Group is Cyclic | Abstract Algebra

8:17

Every subgroup of a cyclic group is cyclic.