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 146 research declarations. Search 10,000 more complete Mathlib declarations.

1 topic

146 results

Clear filters
Project-declaredLean 4.29.0-rc6

Mem W01p of cont Diff has Compact Support

DeGiorgi.memW01p_of_contDiff_hasCompactSupport

Plain-language statement

A smooth compactly supported function belongs to W₀^{1,p}(ℝ^d).

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

View proof record
Project-declaredLean 4.29.0-rc6

Mem W01p of cont Diff has Compact Support subset

DeGiorgi.memW01p_of_contDiff_hasCompactSupport_subset

Plain-language statement

A smooth compactly supported function whose support is contained in an open set belongs to W₀^{1,p} on that set.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

View proof record
Project-declaredLean 4.29.0-rc6

Mem W01p of mem W1p of tsupport subset

DeGiorgi.memW01p_of_memW1p_of_tsupport_subset

Plain-language statement

Localization by compact support: a finite-p Sobolev function whose support is compactly contained in an open set belongs to W₀^{1,p}.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

View proof record
Project-declaredLean 4.29.0-rc6

Mem W01p add

DeGiorgi.MemW01p.add

Plain-language statement

H₀¹(Ω) is closed under addition.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

View proof record
Project-declaredLean 4.29.0-rc6

Mem W01p smul

DeGiorgi.MemW01p.smul

Plain-language statement

H₀¹(Ω) is closed under scalar multiplication.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

View proof record
Project-declaredLean 4.29.0-rc6

Mem W1p Witness ae eq

DeGiorgi.MemW1pWitness.ae_eq

Plain-language statement

Two W^{1,2} witnesses on an open set have a.e.-equal gradients.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

View proof record