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3 votes
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Completion of infinite degree extension of perfectoid fields is perfectoid?

Is completion of infinite degree extension of perfectoid fields perfectoid ? It is known that finite extension of perfectoid fields is also perftoid from tilting correspondence, but what about ...
Duality's user avatar
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12 votes
1 answer
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An explicit isomorphism $K^\times/K^{\times p} \cong K^\flat/\wp K^\flat$ where $K \supset \mu_p$ is perfectoid field of mixed characteristic $(0, p)$

Let $K$ be a perfectoid field of mixed characteristic $(0, p)$, i.e. $K$ has characteristic $0$ but its residue field has characteristic $p$. Further suppose that $K$ contains all the $p$th roots of ...
Kenny Lau's user avatar
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