Source-pinned research

Research proof index

Search theorem names, mathematical ideas, modules, topics, projects, and role-labelled researchers. Open a result for its complete indexed Lean declaration and source record.

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

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Project-declaredLean 4.29.0-rc6

Ae eq zero of mem H01 of grad Lp Of Witness eq zero

DeGiorgi.ae_eq_zero_of_memH01_of_gradLpOfWitness_eq_zero

Plain-language statement

A zero-trace Sobolev function with vanishing gradient class vanishes almost everywhere.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

A Harmonic replacement exists

DeGiorgi.aHarmonic_replacement_exists

Plain-language statement

A-harmonic replacement: given u ∈ W^{1,2}(B_R), there exists h that is A-harmonic with h - u ∈ W₀^{1,2}(B_R).

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

A Harmonic replacement unique

DeGiorgi.aHarmonic_replacement_unique

Plain-language statement

A-harmonic replacements are unique up to a.e. equality.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Dirichlet Problem exists of divergence Data

DeGiorgi.dirichletProblem_exists_of_divergenceData

Plain-language statement

Existence of weak solutions to the inhomogeneous Dirichlet problem with boundary datum u₀ and divergence-form right-hand side div F.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Dirichlet Problem unique of divergence Data

DeGiorgi.dirichletProblem_unique_of_divergenceData

Plain-language statement

Inhomogeneous Dirichlet solutions are unique up to a.e. equality.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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