@incollection{eprints2591,
            year = {2014},
           title = {Extended differential aggregations in process algebra for performance and biology},
          series = {Electronic Proceedings in Theoretical Computer Science},
          number = {154},
           pages = {34--47},
           month = {June},
       booktitle = {Proceedings Twelfth International Workshop on Quantitative Aspects of Programming Languages and Systems },
          author = {Max Tschaikowski and Mirco Tribastone},
       publisher = {Open Publishing Association},
            note = {Twelfth International Workshop on Quantitative Aspects of Programming Languages and Systems, held in Grenoble (France), 12-13 April 2014},
             url = {http://eprints.imtlucca.it/2591/},
        abstract = {We study aggregations for ordinary differential equations induced by fluid semantics for Markovian process algebra which can capture the dynamics of performance models and chemical reaction networks. Whilst previous work has required perfect symmetry for exact aggregation, we present approximate fluid lumpability, which makes nearby processes perfectly symmetric after a perturbation of their parameters. We prove that small perturbations yield nearby differential trajectories. Numerically, we show that many heterogeneous processes can be aggregated with negligible errors.}
}