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Jonathan Ragan-Kelley

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Modular GPU Programming with Typed PerspectivesPLDI 20262026-06-15
Prism is a low-level GPU language that tracks thread32 perspective and other granularities in types, exposes constructs like split and group and partition…
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A Mechanized Algebra of Verified Data Structures for Optimizing Sparse Tensor ProgramsPLDI 20262026-06-15
Mechanized framework extends ATL and uses the Rock proof assistant to produce a verified compression/decompression adjoint that rewrites dense tensor kernels…
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Bonsai: Compiling Queries to Pruned Tree TraversalsPLDI 20262026-06-15
Bonsai compiles high-level queries plus an annotated algebraic tree spec into C++ single-pass traversals that automatically generate always/maybe/never pruning…
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A Domain-Specific Probabilistic Programming Language for Reasoning about Reasoning(…)OOPSLA 20252025-10-16
Memo is a domain-specific probabilistic programming language for recursive theory-of-mind models that compiles to JAX and runs on GPUs. It embeds in Python…
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Gauguin, Descartes, Bayes: A Diurnal Golem's BrainOnward! 20252025-10-12
Builds a small probabilistic program in Church that samples and conditions over program-space to infer its own source; uses a grammar-based generator, eval…
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Lightweight and Locality-Aware Composition of Black-Box SubroutinesPLDI 20252025-06-16
A system called Fern enriches black-box subroutine interfaces with producer-consumer annotations that describe how small data blocks are produced and consumed…
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A Domain-Specific PPL for Reasoning about Reasoning (or: a memo on memo)LAFI 20252025-01-19
Introduces memo, a Python-embedded domain-specific PPL that replaces sample/infer with choose/observe semantics and compiles recursive theory-of-mind models…
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Distributions for Compositionally Differentiating Parametric DiscontinuitiesOOPSLA 20242024-10-20
Introduces Potto prototype as the first differentiable first-order language that soundly differentiates parametric discontinuities, gives a denotational…
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A Verified Compiler for a Functional Tensor LanguagePLDI 20242024-06-24
A mechanically verified implementation of a lowering algorithm for ATL proves that a functional tensor program lowers to imperative loop nests that write…
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The Future of Fast Code: Giving Hardware What It WantsPLDI 20242024-06-24
Hardware offers huge gains but only with heavy specialization: simple Python matrix multiply hits ~10 MFLOPS, JavaScript ~500 MFLOPS, optimized C reaches ~1–40…
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Verified Tensor-Program Optimization Via High-Level Scheduling RewritesPOPL 20222022-01-16
A Coq-verified framework implements a pure functional tensor IR called ATL and a suite of semantics-preserving, source-to-source rewrites plus reshape…
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Efficient Automatic Scheduling of Imaging & Vision Pipelines for the GPUOOPSLA 20212021-10-17
An autoscheduler generates GPU code from Halide algorithm code by combining a two-phase search that freezes low-cost stages, hierarchical sampling that groups…
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