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.

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Project-declaredLean 4.29.0-rc6

Has Weak Partial Deriv ae eq

DeGiorgi.HasWeakPartialDeriv.ae_eq

Plain-language statement

A weak partial derivative on an open set is 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

Has Weak Partial Deriv mul smooth

DeGiorgi.HasWeakPartialDeriv.mul_smooth

Plain-language statement

Product rule for weak derivatives against a smooth scalar factor.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Has Weak Partial Deriv of cont Diff

DeGiorgi.HasWeakPartialDeriv.of_contDiff

Plain-language statement

Classical derivatives give weak derivatives on open sets.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Has Weak Partial Deriv of e Lp Norm Approx p

DeGiorgi.HasWeakPartialDeriv.of_eLpNormApprox_p

Plain-language statement

L^p-closure of weak partial derivatives on an open set, for 1 < p < ∞.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Indicator bmo bound

DeGiorgi.indicator_bmo_bound

Plain-language statement

On balls staying inside Metric.ball x₀ r, the zero extension agrees with u.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Indicator component mem Lp

DeGiorgi.indicator_component_memLp

Plain-language statement

Truncating an function by the positivity set of an a.e.-measurable scalar function preserves .

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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