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Formally Verified Samplers from Probabilistic Programs with Loops and Conditioning

Offered By: ACM SIGPLAN via YouTube

Tags

Probabilistic Programming Courses OCaml Courses Compiler Design Courses Formal Verification Courses Coq Courses

Course Description

Overview

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Explore a 20-minute conference talk from PLDI 2023 that introduces Zar, a formally verified compiler pipeline for discrete probabilistic programs. Learn how Zar translates programs with unbounded loops in the conditional probabilistic guarded command language (cpGCL) into proved-correct executable samplers using the random bit model. Discover the key concept of reducing all discrete probability distributions to unbiased coin-flipping schemes. Examine the compilation process, including the translation to choice-fix trees and coinductive interaction trees. Understand the sampling equidistribution theorem that establishes the correctness of compiled samplers. Gain insights into the implementation and verification in Coq, as well as the extraction of verified samplers to OCaml and Python. See empirical validations on illustrative examples and explore the available artifacts evaluated as reusable.

Syllabus

[PLDI'23] Formally Verified Samplers from Probabilistic Programs with Loops and Conditioning


Taught by

ACM SIGPLAN

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