Samplinglib
Lean gate not recorded for this source state main · 0e31a3cda412
best upper · Normalized SampleWiki statement

Implemented proximal sampler

A paper-first mathematical case study: read the theorem, the derivation route, and the hidden prerequisites before opening formal infrastructure.

Formal topologyOpen this result's proof branch↗
Statement

Normalized SampleWiki statement

Primary theorem audit pending — this is not presented as a verbatim paper theorem

Chewi (2026), Corollary 8.6.3primary theorem audit in progress
Guarantee / accuracy
\[\lVert\mu_N-\pi\rVert_{\rm TV}\le\varepsilon\]
Complexity / rate
\[\widetilde O(\beta\sqrt d\,R_0^2/\varepsilon^2)\]

Reading. Read the accuracy guarantee together with the complexity/rate: the source assumptions and its notion of oracle cost are part of the result.

Primary theorem audit pending. The formulas below are the cleaned SampleWiki normalization of the cited result, not a claim of verbatim theorem transcription.

Proof / derivation

Reader derivation map · Proximal contraction and implementation route

This is a source-linked reading map for Chewi (2026), Corollary 8.6.3, not a transcription of the paper's proof. Exact source proof equations replace this map once theorem-level audit is complete.

01

Analyze the ideal proximal transition, where the Gaussian augmentation exposes a tractable conditional step.

02

Convert the ideal contraction into the theorem's requested divergence or transport guarantee.

03

Implement each restricted-Gaussian/proximal call and track its approximation error without hiding it inside the ideal chain.

\[\lVert\mu_N-\pi\rVert_{\rm TV}\le\varepsilon\]
04

Compose iteration count and per-call cost, then tune the internal accuracy to obtain the displayed total rate.

\[\widetilde O(\beta\sqrt d\,R_0^2/\varepsilon^2)\]
Assumptions and implicit prerequisites

What must be true before the rate can be read

Model and geometry

  • The target is log-concave with the source's smoothness hypothesis on the potential or score.
  • The initialization scale, typically expressed through a Wasserstein or divergence quantity, is part of the bound.
  • Implemented proximal results additionally require the restricted-Gaussian/proximal oracle promised by the source theorem.

Analytic / proof prerequisites

  • Exact theorem-level parameter ranges and technical hypotheses remain controlled by the cited paper until primary-source audit is complete.
ASTIS rigorous LaTeX
Guarantee / accuracy
\[\lVert\mu_N-\pi\rVert_{\rm TV}\le\varepsilon\]
Complexity / rate
\[\widetilde O(\beta\sqrt d\,R_0^2/\varepsilon^2)\]
Lean formalization

This fold is intentionally quiet while the source statement, proof route, and assumptions are being completed case by case. A source-facing Lean theorem will appear here only after it compiles and its statement has been matched to the audited source.

References and provenance

SampleWiki setting

ASTIS-SW-SETTING-LOG-CONCAVE-SMOOTH-BEST-UPPER-IMPLEMENTED-PROXIMAL-SAMPLER · source snapshot 0c93b235281ec46c