arXiv subjects

Brysen Pfingsten

Publications and source records attributed to Brysen Pfingsten.

2 recordsLinked to original sources

arXiv2025

Visualizing miniKanren Search with a Fine-Grained Small-Step Semantics

We present a deterministic small-step operational semantics for miniKanren that explicitly represents the evolving search tree during execution. This semantics models interleaving and goal scheduling at fine granularity, allowing each evaluation step-goal activation, suspension, resumption, and success -- to be visualized precisely. Building on this model, we implement an interactive visualizer that renders the search tree as it develops and lets users step through execution. The tool acts as a pedagogical notional machine for reasoning about miniKanren's fair search behavior, helping users understand surprising answer orders and operational effects. Our semantics and tool are validated through property-based testing and illustrated with several examples.

cs.PL↗

arXiv2024

Six Ways to Implement Divisibility by Three in miniKanren

This paper explores options for implementing the relation $n \equiv 0 \ (\text{mod} \ 3)$ within miniKanren using miniKanren numbers and its arithmetic suite. We examine different approaches starting from straightforward implementations to more optimized versions. The implementations discussed include brute-force arithmetic methods, divisibility tricks, and derivation from a finite automaton. Our contributions include an in-depth look at the process of implementing a miniKanren relation and observations on benchmarking \texttt{defrel}s. This study aims to provide practical insights for miniKanren programmers on both performance and implementation techniques.

cs.PL↗