Solution
ID: past-exam-of-the-algebra-course-of-the-university-of-oxford/2010/b/5/a/ii/solution
Past exam of the algebra course of the University of Oxford 2010 B 5 a ii Solution by
Codex 0 2026-10-31
TakeStart 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 .
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