On the length-decreasing self-reducibility and the many-one-like reducibilities for partial multivalued functions

Ji Won Huh; Shuji Isobe; Eisuke Koizumi; Hiroki Shizuya

doi:10.1587/transinf.E96.D.465

On the length-decreasing self-reducibility and the many-one-like reducibilities for partial multivalued functions

Ji Won Huh, Shuji Isobe, Eisuke Koizumi, Hiroki Shizuya

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

In this paper, we investigate a relationship between the length-decreasing self-reducibility and the many-one-like reducibilities for partial multivalued functions. We show that if any parsimonious (manyone or metric many-one) complete function for NPMV (or NPMV_g) is length-decreasing self-reducible, then any function in NPMV (or NPMV_g) has a polynomial-time computable refinement. This result implies that there exists an NPMV (or NPMV_g)-complete function which is not length-decreasing self-reducible unless P = NP.

Original language	English
Pages (from-to)	465-471
Number of pages	7
Journal	IEICE Transactions on Information and Systems
Volume	E96-D
Issue number	3
DOIs	https://doi.org/10.1587/transinf.E96.D.465
Publication status	Published - 2013 Mar

Keywords

Length-decreasing self-reduction
Many-one-like reduction
Partial multivalued function

ASJC Scopus subject areas

Software
Hardware and Architecture
Computer Vision and Pattern Recognition
Electrical and Electronic Engineering
Artificial Intelligence

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10.1587/transinf.E96.D.465

Cite this

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AU - Isobe, Shuji

AU - Koizumi, Eisuke

AU - Shizuya, Hiroki

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AB - In this paper, we investigate a relationship between the length-decreasing self-reducibility and the many-one-like reducibilities for partial multivalued functions. We show that if any parsimonious (manyone or metric many-one) complete function for NPMV (or NPMVg) is length-decreasing self-reducible, then any function in NPMV (or NPMVg) has a polynomial-time computable refinement. This result implies that there exists an NPMV (or NPMVg)-complete function which is not length-decreasing self-reducible unless P = NP.

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KW - Many-one-like reduction

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On the length-decreasing self-reducibility and the many-one-like reducibilities for partial multivalued functions

Abstract

Keywords

ASJC Scopus subject areas

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