Solution

ID: past-exam-of-the-algebra-course-of-the-university-of-oxford/2010/b/5/a/ii/solution

Take
Start with , whose factors are and , and then append the coordinate factors of the elementary Abelian group . More explicitly, append for . Each subgroup is normal in the next, and the factors consist of one and copies of . Thus there are exactly finite cyclic factors. The group is non-Abelian because it contains .

New to topics? Read the docs here!