Optimising problem formulation for cylindrical algebraic decomposition

Russell Bradford, James H. Davenport, Matthew England, David Wilson

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

28 Citations (Scopus)
10 Downloads (Pure)

Abstract

Cylindrical algebraic decomposition (CAD) is an important tool for the study of real algebraic geometry with many applications both within mathematics and elsewhere. It is known to have doubly exponential complexity in the number of variables in the worst case, but the actual computation time can vary greatly. It is possible to offer different formulations for a given problem leading to great differences in tractability. In this paper we suggest a new measure for CAD complexity which takes into account the real geometry of the problem. This leads to new heuristics for choosing: the variable ordering for a CAD problem, a designated equational constraint, and formulations for truth-table invariant CADs (TTICADs). We then consider the possibility of using Gröbner bases to precondition TTICAD and when such formulations constitute the creation of a new problem.

Original languageEnglish
Title of host publicationIntelligent Computer Mathematics - MKM, Calculemus, DML, and Systems and Projects 2013 - Held as Part of CICM 2013, Proceedings
EditorsJacques Carette, David Aspinall, Christoph Lange, Petr Sojka, Wolfgang Windsteiger
Place of PublicationHeidelberg
PublisherSpringer
Pages19-34
Number of pages16
Volume7961 LNAI
ISBN (Electronic)9783642393204
ISBN (Print)9783642393198
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventConference on Intelligent Computer Mathematics, CICM 2013, Co-located with the MKM 2013, Calculemus 2013, DML 2013, and Systems and Projects 2013 - Bath, United Kingdom
Duration: 8 Jul 201312 Jul 2013

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume7961 LNAI
ISSN (Print)03029743
ISSN (Electronic)16113349

Conference

ConferenceConference on Intelligent Computer Mathematics, CICM 2013, Co-located with the MKM 2013, Calculemus 2013, DML 2013, and Systems and Projects 2013
CountryUnited Kingdom
CityBath
Period8/07/1312/07/13

Keywords

  • cylindrical algebraic decomposition
  • Gröbner bases
  • problem formulation
  • symbolic computation

ASJC Scopus subject areas

  • Computer Science(all)
  • Theoretical Computer Science

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