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feat(Expander): Efron–Stein and the coordinate-pair bound for shears and translations - #1699

Merged

SamuelSchlesinger merged 12 commits into

cslib-community:mainfrom

chris-ai1:feat/coordinate-pairs-1444

Oct 31, 2026

Merged

feat(Expander): Efron–Stein and the coordinate-pair bound for shears and translations#1699
SamuelSchlesinger merged 12 commits into
cslib-community:mainfrom
chris-ai1:feat/coordinate-pairs-1444

Commits on Oct 29, 2026
- feat(Expander): uniform spectral gap for the shear-translation graph on ZMod n × ZMod n (#1444)
  
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  da700d5
Commits on Oct 30, 2026
- refactor(Expander): share the shears of R × R; credit the OpenAI preprint (#1444)
  
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  6553d6d
- docs(Expander): credit the OpenAI Lean development for the Fourier ping-pong (#1444)
  
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- Merge remote-tracking branch 'origin/main' into feat/box-product-poincare-1444
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- feat(Expander): relative Poincaré inequality for shears and translations with a spectator (#1682)
  
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- refactor(Expander): move the dftProd lemmas to ZModProd and drop import all; credit AffineSampling.lean (#1682)
  
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- feat(Expander): Efron–Stein and the pair-move bound on Y × (Fin H → ZMod L) (#1682)
  
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- doc(Probability): cite Efron–Stein and Steele; numeric Efron–Stein test (#1682)
  
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- Merge origin/main into feat/shear-translation-gap-1444
  
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- Merge refreshed #1678 (30c83e230) into feat/relative-shear-translation-1444
  
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- Merge refreshed #1695 (d72e8e9e6) into feat/coordinate-pairs-1444
  
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Commits on Oct 31, 2026
- chore(Expander): restack coordinate-pair helpers on main
  SamuelSchlesinger
  committed
  e3ab44c

Commits

Commits on Oct 29, 2026

Commits on Oct 30, 2026

Commits on Oct 31, 2026