Source-pinned research

Research proof index

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This index contains 21 research declarations. Search 10,000 more complete Mathlib declarations.

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Project-declaredLean 4.30.0

Wkp U norm derivto Lp le

WkpU.norm_derivtoLp_le

Plain-language statement

The Lp norm of the n-th weak derivative of f is bounded by the W^{k,p} norm.

partial differential equationsSobolev spacesanalysis

Source project: PDE

Person-level attribution pending.

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Project-declaredLean 4.30.0

Wkp U tendsto iff all deriv ELp Norm

WkpU.tendsto_iff_all_derivELpNorm

Plain-language statement

Convergence in W^{k,p}(U) is equivalent to convergence of each weak-derivative eLpNorm component to zero: fₙ → f in W^{k,p} if and only if ‖D^s(fₙ - f)‖_{Lp} → 0 for all multi-indices s with |s| ≤ k.

partial differential equationsSobolev spacesanalysis

Source project: PDE

Person-level attribution pending.

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Project-declaredLean 4.30.0

Wkp UNorm eq zero iff

WkpUNorm_eq_zero_iff

Plain-language statement

The W^{k,p}(U) norm vanishes iff the function is zero a.e..

partial differential equationsSobolev spacesanalysis

Source project: PDE

Person-level attribution pending.

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