Source-pinned research

Research proof index

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Project-declaredLean 4.33.0-rc1

Le maximal Unramified iff

IsNonarchimedeanLocalField.le_maximalUnramified_iff

Plain-language statement

The maximal unramified subextension is maximal.

number theoryclass field theorylocal fields

Source project: Class Field Theory

Person-level attribution pending.

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Project-declaredLean 4.33.0-rc1

Nonempty unramified Extension alghom of dvd f

IsNonarchimedeanLocalField.nonempty_unramifiedExtension_alghom_of_dvd_f

Plain-language statement

If Kn denotes the unramified extension of K of degree n, then Kn embeds into L if n ∣ f K L. This is half of the universal property.

number theoryclass field theorylocal fields

Source project: Class Field Theory

Person-level attribution pending.

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