^^Azioni di un gruppo.
- Timothy Gowers
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2011/11/06/group-actions-i/
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2011/11/09/group-actions-ii-the-orbit-stabilizer-theorem/
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2011/11/25/group-actions-iii-whats-the-point-of-them/
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2011/12/10/group-actions-iv-intrinsic-actions/
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2011/10/16/permutations/
wp/Group_action