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How to Approximate Leximax-optimal Solutions

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21730%2F21%3A00354101" target="_blank" >RIV/68407700:21730/21:00354101 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    How to Approximate Leximax-optimal Solutions

  • Original language description

    Many real-world problems can be modelled as Multi-Objective Combinatorial Opti misation (MOCO) problems. In the multi-objective case, there is not a single optimum value but a set of optima known as Pareto-optima. However, the number of Pareto-optima can be too large to enumerate. Instead, one can compute a minimum Pareto-optimum according to an order. The leximax order selects a Pareto-optimum such that the objec tive functions with the worst values are penalised the least. Unlike other orders, such as the lexicographic order or the weighted sum order, the leximax order does not favour any objective function at the expense of others. Also, the leximax-optimum has a guaranteed small trade-off between the objective functions. In some real-world MOCO problems, the time to find a solution may be limited and computing a leximax-optimal solution may take too long. In such problems, we search for solutions that can be computed in the given admissible amount of time and that are as close to the leximax-optimum as possible. In other words, we approximate the leximax optimum. In this paper, we present and evaluate SAT-based algorithms and heuristics for ap proximating the leximax-optimum of Multi-Objective Boolean Satisfiability problems. The evaluation is performed in the context of the package upgradeability problem, on the set of benchmarks from the Mancoosi International Solver Competition, with combinations of up to five different objective functions.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Result continuities

  • Project

    <a href="/en/project/LL1902" target="_blank" >LL1902: Powering SMT Solvers by Machine Learning</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Pragmatics of SAT a workshop of the 24nd International Conference on Theory and Applications of Satisfiability Testing

  • ISBN

  • ISSN

    1574-0617

  • e-ISSN

    1574-0617

  • Number of pages

    16

  • Pages from-to

  • Publisher name

    IOS Press

  • Place of publication

    Amsterdam

  • Event location

    Barcelona

  • Event date

    Jul 5, 2021

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article