Source-pinned research

Research proof index

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This index contains 146 research declarations. Search 10,000 more complete Mathlib declarations.

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Project-declaredLean 4.29.0-rc6

Abs sub const bmo le two

DeGiorgi.abs_sub_const_bmo_le_two

Plain-language statement

The absolute value function |u - c| has BMO seminorm at most 2M whenever u has BMO seminorm at most M. Uses the reverse triangle inequality ||a| - |b|| ≤ |a - b|.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Abs subball Average sub ball Average le

DeGiorgi.abs_subballAverage_sub_ballAverage_le

Plain-language statement

The average on a sub-ball differs from the average on a larger ball by at most the volume ratio times the mean oscillation on the larger ball.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Ae eq dyadic Ball Average Limit on half Ball

DeGiorgi.ae_eq_dyadicBallAverageLimit_on_halfBall

Plain-language statement

On the inner ball, the dyadic Campanato average limit agrees a.e. with the original function.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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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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