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docs(gametheory,#15949): Stearns tribute — series-README encarts (complement to #15963) #15971

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11 changes: 11 additions & 0 deletions MyIA.AI.Notebooks/GameTheory/SocialChoice/README.md
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Expand Up @@ -13,6 +13,17 @@ Cette sous-série du parcours [GameTheory](../README.md) explore ces résultats

**À qui s'adresse cette série** : étudiants en économie, informatique, sciences politiques et mathématiques appliquées. Les notebooks 01 et 03 ne nécessitent que Python (numpy, matplotlib). Les notebooks 02 (Lean) et 04 (SAT/Z3) requièrent des installations supplémentaires décrites dans le [README parent](../README.md). Aucun prérequis en théorie du choix social : les concepts sont introduits progressivement.

> **Hommage — Richard E. Stearns (1936-2026).** Le tout premier article publié par Richard E.
> Stearns — alors étudiant à Carleton College — portait sur le **paradoxe d'Arrow** (*The American
> Mathematical Monthly*, 1959). Stearns est devenu co-fondateur de la théorie de la complexité
> computationnelle (prix Turing 1993, avec Juris Hartmanis, pour leur papier fondateur de 1965) ;
> il s'est éteint le 29 août 2026 à Ann Arbor (Michigan), à 90 ans. La série SocialChoice garde de
> ce lien une continuité rare : l'impossibilité d'agrégation parfaite (Arrow) et la complexité
> computationnelle comme mesure de la difficulté sont les deux faces d'une même question. Détails
> et résonances dans l'hommage [#15949](https://github.com/jsboige/CoursIA/issues/15949) ; un
> encart hommage figure également dans
> [SC-01](01-Arrow-Impossibility-Theorem.ipynb).

## Notebooks

| # | Notebook | Titre | Durée | Status |
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11 changes: 11 additions & 0 deletions MyIA.AI.Notebooks/GameTheory/repeated_games_lean/README.en.md
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> **Formal companion** of the pedagogical notebook [GameTheory-6c](../GameTheory-06c-RepeatedGames-FolkTheorem.ipynb) (`Repeated Games` — Iterated prisoner's dilemma). The active sources live in [`game_theory_lean/RepeatedGames/`](../game_theory_lean/RepeatedGames/).

> **Tribute — Richard E. Stearns (1936-2026), "semi-author".** The work Richard E. Stearns carried
> out at the *Arms Control and Disarmament Agency* on **repeated games with incomplete
> information** — game theory applied to arms control — became a chapter of the Aumann & Maschler
> book, *Repeated Games with Incomplete Information* (MIT Press, 1995), whose title page reads
> *"with the collaboration of Richard E. Stearns"*. He described himself as a "semi-author" of
> that Lanchester Prize-winning book and liked to tell *"the story of how I almost won the
> Lanchester Prize"*. Stearns (1936-2026, Turing Award 1993 with Juris Hartmanis for the founding
> paper of computational complexity theory) passed away on 29 August 2026 in Ann Arbor. His first
> publication was on Arrow's paradox — see [`SocialChoice/`](../SocialChoice/README.md). Full
> tribute: [#15949](https://github.com/jsboige/CoursIA/issues/15949) (part 2/3).

## Headline theorem

**Grim trigger sustains cooperation iff δ ≥ (T − R) / (T − P)** (one-shot deviation principle).
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