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Questions
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Can a group be a finite union of (left) cosets of infinite-index subgroups?

mar 7 10 at 17:45 Pete L. Clark 40k●4●103●227

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How are the two natural ways to define ‘'the category of models of a first-order theory T’' related?

jun 11 10 at 10:59 mmm 772●3●8

 
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When does a transitive action of a profinite group have an infinite orbit?

jun 19 11 at 7:45 Stephen S 784●1●7●9

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Bi-embeddability vs. isomorphism

may 13 10 at 5:28 Pete L. Clark 40k●4●103●227