Higher-Order and Symbolic Computation

, Volume 25, Issue 1, pp 39–84 | Cite as

Functional programs as compressed data

  • Naoki Kobayashi
  • Kazutaka Matsuda
  • Ayumi Shinohara
  • Kazuya Yaguchi
Article

Abstract

We propose an application of programming language techniques to lossless data compression, where tree data are compressed as functional programs that generate them. This “functional programs as compressed data” approach has several advantages. First, it follows from the standard argument of Kolmogorov complexity that the size of compressed data can be optimal up to an additive constant.

Secondly, a compression algorithm is clean: it is just a sequence of β-expansions (i.e., the inverse of β-reductions) for λ-terms. Thirdly, one can use program verification and transformation techniques (higher-order model checking, in particular) to apply certain operations on data without decompression. In this article, we present algorithms for data compression and manipulation based on the approach, and prove their correctness. We also report preliminary experiments on prototype data compression/transformation systems.

Keywords

Semantics based program manipulation Program transformation Data compression Functional programs Higher-order Model Checking 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Naoki Kobayashi
    • 1
  • Kazutaka Matsuda
    • 1
  • Ayumi Shinohara
    • 2
  • Kazuya Yaguchi
    • 2
  1. 1.Graduate School of Information Science and TechnologyUniversity of TokyoTokyoJapan
  2. 2.Graduate School of Information SciencesTohoku UniversitySendaiJapan

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