Kourovka Problem 21.8: Class transpositions generate the full symmetric group

For k ≥ 4, horizontal class transpositions of moduli at most k generate a group isomorphic to the symmetric group on lcm(2,…,k) letters.

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For k ≥ 4, horizontal class transpositions of moduli at most k generate a group isomorphic to the symmetric group on lcm(2,…,k) letters.

Why it matters

The proof gives a general group description for Problem 21.8.

What counts as progress

A specific group theory result with documented AI mathematical work, a stated prior baseline and a checkable source.

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