The identification and exploitation of almost symmetry in planning problems

J. Porteous, D. Long, M. Fox, K. Brown (Editor)

Research output: Contribution to conferencePaper

Abstract

Previous work in symmetry detection for planning has identified symmetries between domain objects and shown how the exploitation of this information can help reduce search at plan time. However these methods are unable to detect symmetries between objects that are almost symmetrical: where the objects must start (or end) in slightly different configurations but for much of the plan their behaviour is equivalent. In the paper we outline a method for identifying such symmetries and discuss how this symmetry information can be positively exploited to help direct search during planning we have implemented this method and integrated it with the FF-v2.3 planner and in the paper we present results of experiments with this approach that demonstrate its potential.

Conference

Conference23rd UK Planning and Scheduling Special Interest Group
Abbreviated titlePlanSIG 2004
CountryIreland
CityCork
Period20/12/0421/12/04

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Planning
Experiments

Keywords

  • symmetry detection
  • planning

Cite this

Porteous, J., Long, D., Fox, M., & Brown, K. (Ed.) (2004). The identification and exploitation of almost symmetry in planning problems. Paper presented at 23rd UK Planning and Scheduling Special Interest Group, Cork, Ireland.
Porteous, J. ; Long, D. ; Fox, M. ; Brown, K. (Editor). / The identification and exploitation of almost symmetry in planning problems. Paper presented at 23rd UK Planning and Scheduling Special Interest Group, Cork, Ireland.
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keywords = "symmetry detection, planning",
author = "J. Porteous and D. Long and M. Fox and K. Brown",
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Porteous, J, Long, D, Fox, M & Brown, K (ed.) 2004, 'The identification and exploitation of almost symmetry in planning problems' Paper presented at 23rd UK Planning and Scheduling Special Interest Group, Cork, Ireland, 20/12/04 - 21/12/04, .

The identification and exploitation of almost symmetry in planning problems. / Porteous, J.; Long, D.; Fox, M.; Brown, K. (Editor).

2004. Paper presented at 23rd UK Planning and Scheduling Special Interest Group, Cork, Ireland.

Research output: Contribution to conferencePaper

TY - CONF

T1 - The identification and exploitation of almost symmetry in planning problems

AU - Porteous, J.

AU - Long, D.

AU - Fox, M.

A2 - Brown, K.

PY - 2004

Y1 - 2004

N2 - Previous work in symmetry detection for planning has identified symmetries between domain objects and shown how the exploitation of this information can help reduce search at plan time. However these methods are unable to detect symmetries between objects that are almost symmetrical: where the objects must start (or end) in slightly different configurations but for much of the plan their behaviour is equivalent. In the paper we outline a method for identifying such symmetries and discuss how this symmetry information can be positively exploited to help direct search during planning we have implemented this method and integrated it with the FF-v2.3 planner and in the paper we present results of experiments with this approach that demonstrate its potential.

AB - Previous work in symmetry detection for planning has identified symmetries between domain objects and shown how the exploitation of this information can help reduce search at plan time. However these methods are unable to detect symmetries between objects that are almost symmetrical: where the objects must start (or end) in slightly different configurations but for much of the plan their behaviour is equivalent. In the paper we outline a method for identifying such symmetries and discuss how this symmetry information can be positively exploited to help direct search during planning we have implemented this method and integrated it with the FF-v2.3 planner and in the paper we present results of experiments with this approach that demonstrate its potential.

KW - symmetry detection

KW - planning

UR - http://www.cis.strath.ac.uk/research/publications/papers/strath_cis_publication_586.pdf

M3 - Paper

ER -

Porteous J, Long D, Fox M, Brown K, (ed.). The identification and exploitation of almost symmetry in planning problems. 2004. Paper presented at 23rd UK Planning and Scheduling Special Interest Group, Cork, Ireland.