[Merged by Bors] - feat(GroupTheory/GroupAction/Primitive): lemmas about primitive actions for finite sets#12053
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[Merged by Bors] - feat(GroupTheory/GroupAction/Primitive): lemmas about primitive actions for finite sets#12053AntoineChambert-Loir wants to merge 242 commits intomasterfrom
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Second branch towards the iwasawa criterion We import blocks.
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…ns for finite sets (#12053) This PR establishes lemmas about primitive actions for finite types. It also proves the theorem of Rudio : for a primitive action on a finite type, any subset which is neither empty nor full has a translate that contains a given point and avoids another given one.
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This PR establishes lemmas about primitive actions for finite types.
It also proves the theorem of Rudio : for a primitive action on a finite type, any subset
which is neither empty nor full has a translate that contains a given point and avoids another given one.