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Intitulé:   
The Power of Well-Structured Systems
du groupe Modélisation et Verification

Date 2014-02-06  11:15-12:15
TitreThe Power of Well-Structured Systems 
RésuméWell-structured systems, aka WSTS, are computational models where the set of possible configurations is equipped with a well-quasi-ordering which is compatible with the transition relation between configurations. This structure supports generic decidability results that are important in verification and several other fields. This paper recalls the basic theory underlying well-structured systems and shows how two classic decision algorithms can be formulated as an exhaustive search for some "bad" sequences. This lets us describe new powerful techniques for the complexity analysis of WSTS algorithms. Recently, these techniques have been successful in precisely characterizing the power, in a complexity-theoretical sense, of several important WSTS models like unreliable channel systems, monotonic counter machines, or networks of timed systems. [ Paper ] Joint work with Sylvain Schmitz.  
Lieu076 
OrateurPhilippe Schnoebelen 
Emailphs@lsv.ens-cachan.fr 
UrlLSV 



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