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Computational Complexity of Solving Equation Systems

  • Przemysław Broniek
Book

Part of the SpringerBriefs in Philosophy book series (BRIEFSPHILOSOPH)

Table of contents

  1. Front Matter
    Pages i-ix
  2. Przemysław Broniek
    Pages 1-12
  3. Przemysław Broniek
    Pages 13-32
  4. Przemysław Broniek
    Pages 33-41
  5. Przemysław Broniek
    Pages 43-61
  6. Przemysław Broniek
    Pages 63-64

About this book

Introduction

This volume considers the computational complexity of determining whether a system of equations over a fixed algebra A has a solution. It examines in detail the two problems this leads to: SysTermSat(A) and SysPolSat(A), in which equations are built out of terms or polynomials, respectively. The book characterizes those algebras for which SysPolSat can be solved in a polynomial time. So far, studies and their outcomes have not covered algebras that generate a variety admitting type 1 in the sense of Tame Congruence Theory. Since unary algebras admit only type 1, this book focuses on these algebras to tackle the main problem. It discusses several aspects of unary algebras and proves that the Constraint Satisfaction Problem for relational structures is polynomially equivalent to SysTermSat over unary algebras. The book’s final chapters discuss partial characterizations, present conclusions, and describe the problems that are still open.

Keywords

four-element 2-valued algebras generic operations with few values open problems reducing CSP to SYSTERMSAT over unary algebras simplification algorithm three-element algebras unary algebras width and complexity of unary algebras

Authors and affiliations

  • Przemysław Broniek
    • 1
  1. 1.Algorithmics Research Group, Faculty of Mathematics and Computer ScienceJagiellonian UniversityKrakówPoland

Bibliographic information

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