Source-pinned research

Research proof index

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This index contains 187 research declarations. Search 10,000 more complete Mathlib declarations.

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Project-declaredLean 4.29.0-rc6

Mem W1p Witness ae eq p

DeGiorgi.MemW1pWitness.ae_eq_p

Plain-language statement

Weak gradients of the same W^{1,p} function agree a.e. on the source open set.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Mem W1p Witness weak Grad ae eq zero on zero Set

DeGiorgi.MemW1pWitness.weakGrad_ae_eq_zero_on_zeroSet

Project documentation

Stampacchia's zero-set theorem for Sobolev witnesses: each weak-gradient component vanishes a.e. on the zero set of the function.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Moser power Cutoff mem W01p energy of subsolution

DeGiorgi.moser_powerCutoff_memW01p_energy_of_subsolution

Plain-language statement

Analytic core of the Moser pre-estimate: the cutoff-power η · (u_+)^(p/2) belongs to W₀^{1,2} on the outer ball and satisfies the exact energy bound needed for Sobolev. The only remaining nonlinear gap is the construction of the underlying W^{1,2} witness and its energy bound.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Moser Decay Ratio sum le half dim

DeGiorgi.moserDecayRatio_sum_le_half_dim

Plain-language statement

Auxiliary geometric-product bound for the explicit Moser majorant.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Moser Reg Pow le rpow of nonneg le N

DeGiorgi.moserRegPow_le_rpow_of_nonneg_le_N

Plain-language statement

moserRegPow ε N p t ≤ (ε + t) ^ (p / 2) for 0 ≤ t ≤ N, since moserRegPow t = (ε + clip(t))^{p/2} - ε^{p/2} and ε^{p/2} ≥ 0.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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Project-declaredLean 4.29.0-rc6

Moser Reg Pow sq le rpow of nonneg le N

DeGiorgi.moserRegPow_sq_le_rpow_of_nonneg_le_N

Plain-language statement

moserRegPow ε N p t ^ 2 ≤ (ε + t) ^ p for 0 ≤ t ≤ N and 1 < p. Since 0 ≤ moserRegPow ≤ (ε + t)^{p/2}, squaring gives ≤ ((ε + t)^{p/2})^2 = (ε + t)^p.

partial differential equationsregularity theoryanalysis

Source project: DeGiorgi

Person-level attribution pending.

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