~/talks

Philip Wadler

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titleconferencedate
From Lambda to Ledger: An Architectural Comparison of Plinth and PlutarchFUNARCH 20262026-08-29
Compares two Cardano smart‑contract approaches: a GHC plugin (Plinth) vs an embedded DSL (Plutarch), implements seven validators and measures source size…
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Plinth: A Plugin-Powered Language Built on Haskell (Experience Report)Haskell 20252025-10-16
Plinth is a production DSL that reuses a subset of Haskell syntax, compiles via a GHC plugin into PIR → typed Plutus Core (System Fω with iso-recursive types)…
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Haskell equations, thirty-eight years laterHaskell 20252025-10-16
Proposal introduces a compact syntax that makes equation groups unordered unless annotated with a trailing otherwise keyword, so order only matters when…
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Featherweight GoOOPSLA 20202020-11-15
Defines a minimal core language Featherweight Go (FG) and its generic extension Featherweight Generic Go (FGG), proves a semantics-by-translation claim that…
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(Programming Languages) in Agda = Programming (Languages in Agda)Full Stack Fest 20192019-09-04
An executable Agda textbook implements language definitions and checks proofs as programs so examples like addition and a 20‑line proof that plus is…
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Categories for the Working HackerStrange Loop 20182018-09-26
Shows concrete equivalences: products (records/pairs) and sums (disjoint unions/variants) correspond to conjunction and disjunction, and functions are…
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Categories for the Working HackerLambda Days 20182018-02-22
Explains how category theory models three concrete data types — products sums exponentials — and proves the specific isomorphisms like Hom(C, A×B) ≅…
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Category Theory for the Working HackerLambda World 20162016-09-30
Explains how types, logic and category theory are the same machinery by giving concrete categorical semantics for lambda calculus terms: models products and…
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Propositions as TypesLambda Days 20162016-02-25
Argues the concrete claim that propositions as types is an exact correspondence: formulas ↔ types, proofs ↔ programs, and normalization = evaluation, not just…
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Keynote: Propositions as TypesCode Mesh 20152015-11-03
The principle propositions as types asserts a tight isomorphism: natural deduction ↔ typed lambda calculus, proofs ↔ programs, normalization ↔ evaluation…
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Propositions as TypesStrange Loop 20152015-09-24
Claims that Propositions as Types means propositions are types, proofs are programs and proof normalization equals program evaluation, demonstrated by mapping…
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Everything Old is New Again: Quoted Domain Specific LanguagesStrange Loop 20152015-09-24
Claims that Quoted DSLs pair quotation with normalization to enforce the subformula property, so higher‑order host code compiles to first‑order targets…
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Faith, Evolution, and Programming Languages: from Haskell to JavaTech Mesh 20122012-12-04
Claims that Java generics descend from Haskell type classes and that practical adoption demands concrete engineering: a polymorphic Pizza → Java translation, a…
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