Source-pinned research

Research proof index

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This index contains 91 research declarations. Search 10,000 more complete Mathlib declarations.

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Project-declaredLean 4.32.0

Exists of is Invariant of profinite

IsArithFrobAt.exists_of_isInvariant_of_profinite

Plain-language statement

Let G be a finite group acting on S, and R be the fixed subring. If Q is a prime of S with finite residue field, then there exists a Frobenius element Οƒ : G at Q.

number theoryarithmetic geometryFermat's Last Theorem

Source project: Fermat's Last Theorem

Person-level attribution pending.

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Project-declaredLean 4.32.0

Tensor Product localcomponent apply

IsDedekindDomain.FiniteAdeleRing.TensorProduct.localcomponent_apply

Plain-language statement

If Ο† : 𝔸_K^f βŠ— V β†’ 𝔸_K^f βŠ— V is 𝔸_K^f-linear and Ο†β‚š is its local component at a place p then for all x : 𝔸_K^f βŠ— V we have (evalβ‚š βŠ— id_V) (Ο† x) = Ο†β‚š ((evalβ‚š βŠ— id_V) x), or, more colloquiually, (Ο† x)β‚š = Ο†β‚š (xβ‚š).

number theoryarithmetic geometryFermat's Last Theorem

Source project: Fermat's Last Theorem

Person-level attribution pending.

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Project-declaredLean 4.32.0

Base Change Right surjective

IsDedekindDomain.HeightOneSpectrum.adicCompletion.baseChangeRight_surjective

Plain-language statement

The canonical map L βŠ—[K] K_v β†’ ∏_{w|v} L_w is surjective.

number theoryarithmetic geometryFermat's Last Theorem

Source project: Fermat's Last Theorem

Person-level attribution pending.

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